The truth about DDT
WaveCameCrashin
Posts: 2,929
Thought I would post this to celebrate Earth day.. Oh yeah and Happy Birthday Vladimir Lennin :twisted:
http://thechemicaledge.com/2011/06/01/t ... about-ddt/
The creation of an anti-environmental myth
By Aaron Swartz
Sometimes you find mass murderers in the most unlikely places. Take Rachel Carson. She was, by all accounts, a mild-mannered writer for the U.S. Fish and Wildlife Service—hardly a sociopath’s breeding ground. And yet, according to many in the media, Carson has more blood on her hands than Hitler.
The problems started in the 1940s, when Carson left the Service to begin writing full-time. In 1962, she published a series of articles in the New Yorker, resulting in the book Silent Spring—widely credited with launching the modern environmental movement. The book discussed how pesticides and pollutants moved up the food chain, threatening the ecosystems for many animals, especially birds. Without them, it warned, we might face the title’s silent spring.
Farmers used vast quantities of DDT to protect their crops against insects—80 million pounds were sprayed in 1959 alone—but from there it quickly climbed up the food chain. Bald eagles, eating fish that had concentrated DDT in their tissues, headed toward extinction. Humans, likewise accumulating DDT in our systems, appeared to get cancer as a result. Mothers passed the chemical on to their children through breast milk. Silent Spring drew attention to these concerns and, in 1972, the resulting movement succeeded in getting DDT banned in the U.S.—a ban that later spread to other nations.
And that, according to Carson’s critics, is where the trouble started. DDT had been sprayed heavily on houses in developing countries to protect against malaria-carrying mosquitoes. Without it, malaria rates in developing countries skyrocketed. Over 1 million people die from it each year.
To the critics, the solution seems simple: Forget Carson’s emotional arguments about dead birds and start spraying DDT again so we can save human lives.
Worse than Hitler?
“What the World Needs Now Is DDT” asserted the headline of a lengthy feature in the New York Times Magazine (4/11/04). “No one concerned about the environmental damage of DDT set out to kill African children,” reporter Tina Rosenberg generously allowed. Nonetheless, “Silent Spring is now killing African children because of its persistence in the public mind.”
It’s a common theme—echoed by two more articles in the Times by the same author (3/29/06, 10/5/06), and by Times columnists Nicholas Kristof (3/12/05) and John Tierney (6/05/07). The same refrain appears in a Washington Post op-ed by columnist Sebastian Mallaby, gleefully headlined “Look Who’s Ignoring Science Now” (10/09/05). And again in the Baltimore Sun (“Ms. Carson’s views [came] at a cost of many thousands of lives worldwide”—5/27/07), New York Sun (“millions of Africans died . . . thanks to Rachel Carson’s junk science classic”—4/21/06), the Hill (“millions die on the altar of politically correct ideologies”—11/02/05), San Francisco Examiner (“Carson was wrong, and millions of people continue to pay the price”—5/28/07) and Wall Street Journal (“environmental controls were more important than the lives of human beings”—2/21/07).
Even novelists have gotten in on the game. “Banning DDT killed more people than Hitler, Ted,” explains a character in Michael Crichton’s 2004 bestseller, State of Fear (p. 487). “[DDT] was so safe you could eat it.” That fictional comment not only inspired a column on the same theme in Australia’s Sydney Morning Herald (6/18/05), it led Sen. James Inhofe (R-Ok.) to invite Crichton and Dr. Donald R. Roberts, a longtime pro-DDT activist, to testify before the Senate Committee on Environment and Public Works.
But other attacks only seem like fiction. A web page on JunkScience.com features a live Malaria Death Clock next to a photo of Rachel Carson, holding her responsible for more deaths than malaria has caused in total. (“DDT allows [Africans to] climb out of the poverty/subsistence hole in which ‘caring greens’ apparently wish to keep them trapped,” it helpfully explains.) And a new website from the Competitive Enterprise Institute, RachelWasWrong.org, features photos of deceased African children along the side of every page.
Developing resistance
At one level, these articles send a comforting message to the developed world: Saving African children is easy. We don’t need to build large aid programs or fund major health initiatives, let alone develop Third World infrastructure or think about larger issues of fairness. No, to save African lives from malaria, we just need to put our wallets away and work to stop the evil environmentalists.
Unfortunately, it’s not so easy.
For one thing, there is no global DDT ban. DDT is indeed banned in the U.S., but malaria isn’t exactly a pressing issue here. If it ever were, the ban contains an exception for matters of public health. Meanwhile, it’s perfectly legal—and indeed, used—in many other countries: 10 out of the 17 African nations that currently conduct indoor spraying use DDT (New York Times, 9/16/06).
DDT use has decreased enormously, but not because of a ban. The real reason is simple, although not one conservatives are particularly fond of: evolution. Mosquito populations rapidly develop resistance to DDT, creating enzymes to detoxify it, modifying their nervous systems to avoid its effects, and avoiding areas where DDT is sprayed — and recent research finds that that resistance continues to spread even after DDT spraying has stopped, lowering the effectiveness not only of DDT but also other pesticides (Current Biology, 8/9/05).
“No responsible person contends that insect-borne disease should be ignored,” Carson wrote in Silent Spring. “The question that has now urgently presented itself is whether it is either wise or responsible to attack the problem by methods that are rapidly making it worse. . . . Resistance to insecticides by mosquitoes . . . has surged upwards at an astounding rate.”
Unfortunately, her words were ignored. Africa didn’t cut back on pesticides because, through a system called the “Industry Cooperative Program,” the pesticide companies themselves got to participate in the United Nations agency that provided advice on pest control. Not surprisingly, it continued to recommend significant pesticide usage.
When Silent Spring came out in 1962, it seemed as if this strategy was working. To take the most extreme case, Sri Lanka counted only 17 cases of malaria in 1963. But by 1969, things had once again gotten out of hand: 537,700 cases were counted. Naturally, the rise had many causes: Political and financial pressure led to cutbacks on spraying, stockpiles of supplies had been used up, low rainfall and high temperatures encouraged mosquitoes, a backlog of diagnostic tests to detect malaria was processed and testing standards became more stringent. But even with renewed effort, the problem did not go away.
Records uncovered by entomologist Andrew Spielman hint at why (Mosquito, p. 177). For years, Sri Lanka had run test programs to verify DDT’s effectiveness at killing mosquitoes. But halfway through the program, their standards were dramatically lowered. “Though the reason was not recorded,” Spielman writes, “it was obvious that some mosquitoes were developing resistance and the change was made to justify continued spraying.”
But further spraying led only to further resistance, and the problem became much harder to control. DDT use was scaled back and other pesticides were introduced—more cautiously this time—but the epidemic was never again brought under control, with the deadly legacy that continues to this day.
Instead of apologizing, the chemical companies went on the attack. They funded front groups and think tanks to claim the epidemic started because countries “stopped” using their products. In their version of the story, environmentalists forced Africans to stop using DDT, causing the increase in malaria. “It’s like a hit-and-run driver who, instead of admitting responsibility for the accident, frames the person who tried to prevent the accident,” complains Tim Lambert, whose weblog, Deltoid, tracks the DDT myth and other scientific misinformation in the media.
Front and center
Perhaps the most vocal group spreading this story is Africa Fighting Malaria (AFM). Founded in 2000 by Roger Bate, an economist at various right-wing think tanks, AFM has run a major PR campaign to push the pro-DDT story, publishing scores of op-eds and appearing in dozens of articles each year. Bate and his partner Richard Tren even published a book laying out their alternate history of DDT: When Politics Kills: Malaria and the DDT Story.
A funding pitch uncovered by blogger Eli Rabbett shows Bate’s thinking when he first started the project. “The environmental movement has been successful in most of its campaigns as it has been ‘politically correct,’” he explained (Tobacco Archives, 9/98). What the anti-environmental movement needs is something with “the correct blend of political correctness ( . . . oppressed blacks) and arguments (eco-imperialism [is] undermining their future).” That something, Bate proposed, was DDT.
In an interview, Bate said that his motivation had changed after years of working on the issue of malaria. “I think my position has mellowed, perhaps with age,” he told Extra!. “[I have] gone from being probably historically anti-environmental to being very much pro–combating malaria now.” He pointed to the work he’d done making sure money to fight malaria was spent properly, including a study he co-authored in the respected medical journal the Lancet (7/15/06) on dishonest accounting at the World Bank. He insisted that he wasn’t simply pro-DDT, but instead was willing to support whatever the evidence showed worked. And he flatly denied that AFM had ever received money from tobacco, pharmaceutical or chemical companies.
Still, AFM has very much followed the plan Bate laid out in his original funding pitch to corporations: First, create “the intellectual arguments to make our case,” then “disseminate these arguments to people in [developing countries]” who can make convincing spokespeople, and then “promote these arguments . . . in the West.” The penultimate page gives another hint that stopping malaria isn’t the primary goal: “Is the DDT problem still relevant?” is listed as an “intellectual issue to be resolved”—once they got funding. (When asked for comment on this, Bate became upset and changed the subject.)
Bate continues to insist that resistance isn’t much of an issue, because its primary effect is to keep mosquitoes away from DDT-covered areas altogether. Instead he claims “resistance was a useful device by which it was easy to pull the plug” on an anti-malaria campaign that was failing because of administrative incompetence. “You’re not likely to see an aid agency [admit this],” he said when asked for evidence. “I’m not sure what you want me to say. If you read enough of the literature, you get that strong impression.” But few experts aside from those affiliated with AFM seem to have gotten the same impression.
DDT’s dangers
These myths can have serious consequences. For one thing, despite what is claimed by the right, DDT itself is quite harmful. Studies have suggested that prenatal exposure to DDT leads to significant decreases in mental and physical functioning among young children, with the problems becoming more severe when the exposure is more serious (American Journal of Epidemiology, 9/12/06; Pediatrics, 7/1/06), while the EPA classifies it as a probable human carcinogen.
For another, resistance is deadly. Not only has DDT’s overuse made it ineffective, but, as noted, it has led mosquitoes to evolve “cross-resistance”: resistance not only to DDT but also to other insecticides, including those with less dangerous environmental effects.
And perhaps most importantly, the pro-DDT line is a vast distraction. There are numerous other techniques for dealing with malaria: alternative insecticides, bed nets and a combination of drugs called artemisinin-based combination therapy, or ACT. ACT actually kills the malaria parasite fast, allowing the patient a quick recovery, and has a success rate of 95 percent (World Health Organization, 2001). Rollouts of ACT in other countries have slashed malaria rates by 80 to 97 percent (Washington Monthly, 7/06).
But such techniques require money and wealthy nations are hesitant to give it, especially when they think they can just avoid the whole problem by unbanning DDT. “DDT has become a fetish,” says Allan Schapira, a former senior member of the malaria team at the World Health Organization (Washington Monthly, 7/06). “You have people advocating DDT as if it’s the only insecticide that works against malaria, as if DDT would solve all problems, which is obviously absolutely unrealistic.”
As a result, senators and their staff insist that DDT is all that’s necessary. And the new director of WHO’s malaria program, Arata Kochi, kicked off his tenure by telling the malaria team that they were “stupid” and issuing an announcement that “forcefully endorsed wider use of the insecticide DDT” while a representative of the Bush administration stood by his side. Half his staff resigned in response (New York Times, 9/16/06).
There are genuine issues with current malaria control programs: incompetent administration, misuse of funds, outdated techniques, a lack of funding and concern. And, much to their credit, many on the right have drawn attention to these problems. Africa Fighting Malaria has frequently called for more effective monitoring, and conservative Sen. Tom Coburn (R-Ok.) has used his influence to fight corruption in anti-malaria programs.
But the same Tom Coburn recently held up a bill honoring the 100th anniversary of Rachel Carson’s birth on the grounds that “millions of people . . . died because governments bought into Carson’s junk science claims about DDT” (Raw Story, 5/22/07). Even AFM’s Bate was quoted as finding this a bit too much, pointing out that Carson died in 1964, just two years after Silent Spring was published (Washington Post, 5/23/07). But apparently getting a few digs in at the environmental movement is just too hard for conservatives to resist.
From FAIR: Fairness & Accuracy in Reporting, September/Octo
http://thechemicaledge.com/2011/06/01/t ... about-ddt/
The creation of an anti-environmental myth
By Aaron Swartz
Sometimes you find mass murderers in the most unlikely places. Take Rachel Carson. She was, by all accounts, a mild-mannered writer for the U.S. Fish and Wildlife Service—hardly a sociopath’s breeding ground. And yet, according to many in the media, Carson has more blood on her hands than Hitler.
The problems started in the 1940s, when Carson left the Service to begin writing full-time. In 1962, she published a series of articles in the New Yorker, resulting in the book Silent Spring—widely credited with launching the modern environmental movement. The book discussed how pesticides and pollutants moved up the food chain, threatening the ecosystems for many animals, especially birds. Without them, it warned, we might face the title’s silent spring.
Farmers used vast quantities of DDT to protect their crops against insects—80 million pounds were sprayed in 1959 alone—but from there it quickly climbed up the food chain. Bald eagles, eating fish that had concentrated DDT in their tissues, headed toward extinction. Humans, likewise accumulating DDT in our systems, appeared to get cancer as a result. Mothers passed the chemical on to their children through breast milk. Silent Spring drew attention to these concerns and, in 1972, the resulting movement succeeded in getting DDT banned in the U.S.—a ban that later spread to other nations.
And that, according to Carson’s critics, is where the trouble started. DDT had been sprayed heavily on houses in developing countries to protect against malaria-carrying mosquitoes. Without it, malaria rates in developing countries skyrocketed. Over 1 million people die from it each year.
To the critics, the solution seems simple: Forget Carson’s emotional arguments about dead birds and start spraying DDT again so we can save human lives.
Worse than Hitler?
“What the World Needs Now Is DDT” asserted the headline of a lengthy feature in the New York Times Magazine (4/11/04). “No one concerned about the environmental damage of DDT set out to kill African children,” reporter Tina Rosenberg generously allowed. Nonetheless, “Silent Spring is now killing African children because of its persistence in the public mind.”
It’s a common theme—echoed by two more articles in the Times by the same author (3/29/06, 10/5/06), and by Times columnists Nicholas Kristof (3/12/05) and John Tierney (6/05/07). The same refrain appears in a Washington Post op-ed by columnist Sebastian Mallaby, gleefully headlined “Look Who’s Ignoring Science Now” (10/09/05). And again in the Baltimore Sun (“Ms. Carson’s views [came] at a cost of many thousands of lives worldwide”—5/27/07), New York Sun (“millions of Africans died . . . thanks to Rachel Carson’s junk science classic”—4/21/06), the Hill (“millions die on the altar of politically correct ideologies”—11/02/05), San Francisco Examiner (“Carson was wrong, and millions of people continue to pay the price”—5/28/07) and Wall Street Journal (“environmental controls were more important than the lives of human beings”—2/21/07).
Even novelists have gotten in on the game. “Banning DDT killed more people than Hitler, Ted,” explains a character in Michael Crichton’s 2004 bestseller, State of Fear (p. 487). “[DDT] was so safe you could eat it.” That fictional comment not only inspired a column on the same theme in Australia’s Sydney Morning Herald (6/18/05), it led Sen. James Inhofe (R-Ok.) to invite Crichton and Dr. Donald R. Roberts, a longtime pro-DDT activist, to testify before the Senate Committee on Environment and Public Works.
But other attacks only seem like fiction. A web page on JunkScience.com features a live Malaria Death Clock next to a photo of Rachel Carson, holding her responsible for more deaths than malaria has caused in total. (“DDT allows [Africans to] climb out of the poverty/subsistence hole in which ‘caring greens’ apparently wish to keep them trapped,” it helpfully explains.) And a new website from the Competitive Enterprise Institute, RachelWasWrong.org, features photos of deceased African children along the side of every page.
Developing resistance
At one level, these articles send a comforting message to the developed world: Saving African children is easy. We don’t need to build large aid programs or fund major health initiatives, let alone develop Third World infrastructure or think about larger issues of fairness. No, to save African lives from malaria, we just need to put our wallets away and work to stop the evil environmentalists.
Unfortunately, it’s not so easy.
For one thing, there is no global DDT ban. DDT is indeed banned in the U.S., but malaria isn’t exactly a pressing issue here. If it ever were, the ban contains an exception for matters of public health. Meanwhile, it’s perfectly legal—and indeed, used—in many other countries: 10 out of the 17 African nations that currently conduct indoor spraying use DDT (New York Times, 9/16/06).
DDT use has decreased enormously, but not because of a ban. The real reason is simple, although not one conservatives are particularly fond of: evolution. Mosquito populations rapidly develop resistance to DDT, creating enzymes to detoxify it, modifying their nervous systems to avoid its effects, and avoiding areas where DDT is sprayed — and recent research finds that that resistance continues to spread even after DDT spraying has stopped, lowering the effectiveness not only of DDT but also other pesticides (Current Biology, 8/9/05).
“No responsible person contends that insect-borne disease should be ignored,” Carson wrote in Silent Spring. “The question that has now urgently presented itself is whether it is either wise or responsible to attack the problem by methods that are rapidly making it worse. . . . Resistance to insecticides by mosquitoes . . . has surged upwards at an astounding rate.”
Unfortunately, her words were ignored. Africa didn’t cut back on pesticides because, through a system called the “Industry Cooperative Program,” the pesticide companies themselves got to participate in the United Nations agency that provided advice on pest control. Not surprisingly, it continued to recommend significant pesticide usage.
When Silent Spring came out in 1962, it seemed as if this strategy was working. To take the most extreme case, Sri Lanka counted only 17 cases of malaria in 1963. But by 1969, things had once again gotten out of hand: 537,700 cases were counted. Naturally, the rise had many causes: Political and financial pressure led to cutbacks on spraying, stockpiles of supplies had been used up, low rainfall and high temperatures encouraged mosquitoes, a backlog of diagnostic tests to detect malaria was processed and testing standards became more stringent. But even with renewed effort, the problem did not go away.
Records uncovered by entomologist Andrew Spielman hint at why (Mosquito, p. 177). For years, Sri Lanka had run test programs to verify DDT’s effectiveness at killing mosquitoes. But halfway through the program, their standards were dramatically lowered. “Though the reason was not recorded,” Spielman writes, “it was obvious that some mosquitoes were developing resistance and the change was made to justify continued spraying.”
But further spraying led only to further resistance, and the problem became much harder to control. DDT use was scaled back and other pesticides were introduced—more cautiously this time—but the epidemic was never again brought under control, with the deadly legacy that continues to this day.
Instead of apologizing, the chemical companies went on the attack. They funded front groups and think tanks to claim the epidemic started because countries “stopped” using their products. In their version of the story, environmentalists forced Africans to stop using DDT, causing the increase in malaria. “It’s like a hit-and-run driver who, instead of admitting responsibility for the accident, frames the person who tried to prevent the accident,” complains Tim Lambert, whose weblog, Deltoid, tracks the DDT myth and other scientific misinformation in the media.
Front and center
Perhaps the most vocal group spreading this story is Africa Fighting Malaria (AFM). Founded in 2000 by Roger Bate, an economist at various right-wing think tanks, AFM has run a major PR campaign to push the pro-DDT story, publishing scores of op-eds and appearing in dozens of articles each year. Bate and his partner Richard Tren even published a book laying out their alternate history of DDT: When Politics Kills: Malaria and the DDT Story.
A funding pitch uncovered by blogger Eli Rabbett shows Bate’s thinking when he first started the project. “The environmental movement has been successful in most of its campaigns as it has been ‘politically correct,’” he explained (Tobacco Archives, 9/98). What the anti-environmental movement needs is something with “the correct blend of political correctness ( . . . oppressed blacks) and arguments (eco-imperialism [is] undermining their future).” That something, Bate proposed, was DDT.
In an interview, Bate said that his motivation had changed after years of working on the issue of malaria. “I think my position has mellowed, perhaps with age,” he told Extra!. “[I have] gone from being probably historically anti-environmental to being very much pro–combating malaria now.” He pointed to the work he’d done making sure money to fight malaria was spent properly, including a study he co-authored in the respected medical journal the Lancet (7/15/06) on dishonest accounting at the World Bank. He insisted that he wasn’t simply pro-DDT, but instead was willing to support whatever the evidence showed worked. And he flatly denied that AFM had ever received money from tobacco, pharmaceutical or chemical companies.
Still, AFM has very much followed the plan Bate laid out in his original funding pitch to corporations: First, create “the intellectual arguments to make our case,” then “disseminate these arguments to people in [developing countries]” who can make convincing spokespeople, and then “promote these arguments . . . in the West.” The penultimate page gives another hint that stopping malaria isn’t the primary goal: “Is the DDT problem still relevant?” is listed as an “intellectual issue to be resolved”—once they got funding. (When asked for comment on this, Bate became upset and changed the subject.)
Bate continues to insist that resistance isn’t much of an issue, because its primary effect is to keep mosquitoes away from DDT-covered areas altogether. Instead he claims “resistance was a useful device by which it was easy to pull the plug” on an anti-malaria campaign that was failing because of administrative incompetence. “You’re not likely to see an aid agency [admit this],” he said when asked for evidence. “I’m not sure what you want me to say. If you read enough of the literature, you get that strong impression.” But few experts aside from those affiliated with AFM seem to have gotten the same impression.
DDT’s dangers
These myths can have serious consequences. For one thing, despite what is claimed by the right, DDT itself is quite harmful. Studies have suggested that prenatal exposure to DDT leads to significant decreases in mental and physical functioning among young children, with the problems becoming more severe when the exposure is more serious (American Journal of Epidemiology, 9/12/06; Pediatrics, 7/1/06), while the EPA classifies it as a probable human carcinogen.
For another, resistance is deadly. Not only has DDT’s overuse made it ineffective, but, as noted, it has led mosquitoes to evolve “cross-resistance”: resistance not only to DDT but also to other insecticides, including those with less dangerous environmental effects.
And perhaps most importantly, the pro-DDT line is a vast distraction. There are numerous other techniques for dealing with malaria: alternative insecticides, bed nets and a combination of drugs called artemisinin-based combination therapy, or ACT. ACT actually kills the malaria parasite fast, allowing the patient a quick recovery, and has a success rate of 95 percent (World Health Organization, 2001). Rollouts of ACT in other countries have slashed malaria rates by 80 to 97 percent (Washington Monthly, 7/06).
But such techniques require money and wealthy nations are hesitant to give it, especially when they think they can just avoid the whole problem by unbanning DDT. “DDT has become a fetish,” says Allan Schapira, a former senior member of the malaria team at the World Health Organization (Washington Monthly, 7/06). “You have people advocating DDT as if it’s the only insecticide that works against malaria, as if DDT would solve all problems, which is obviously absolutely unrealistic.”
As a result, senators and their staff insist that DDT is all that’s necessary. And the new director of WHO’s malaria program, Arata Kochi, kicked off his tenure by telling the malaria team that they were “stupid” and issuing an announcement that “forcefully endorsed wider use of the insecticide DDT” while a representative of the Bush administration stood by his side. Half his staff resigned in response (New York Times, 9/16/06).
There are genuine issues with current malaria control programs: incompetent administration, misuse of funds, outdated techniques, a lack of funding and concern. And, much to their credit, many on the right have drawn attention to these problems. Africa Fighting Malaria has frequently called for more effective monitoring, and conservative Sen. Tom Coburn (R-Ok.) has used his influence to fight corruption in anti-malaria programs.
But the same Tom Coburn recently held up a bill honoring the 100th anniversary of Rachel Carson’s birth on the grounds that “millions of people . . . died because governments bought into Carson’s junk science claims about DDT” (Raw Story, 5/22/07). Even AFM’s Bate was quoted as finding this a bit too much, pointing out that Carson died in 1964, just two years after Silent Spring was published (Washington Post, 5/23/07). But apparently getting a few digs in at the environmental movement is just too hard for conservatives to resist.
From FAIR: Fairness & Accuracy in Reporting, September/Octo
Post edited by Unknown User on
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Comments
No, I take that back. Everyday is Earth Day!
Thank you, Rachel Carson
-Eddie Vedder, "Smile"
http://www.chem.duke.edu/~jds/cruise_ch ... ddtup.html
-Eddie Vedder, "Smile"
Does it not make sense that the elimination of DDT from the environment as well as efforts to protect species habitat may be helping some bird populations to rebound?
Never-the-less, here are some basic factors regarding bird population that most if not all of the birders I know (and I know some very serious birders) agree on:
--"Weedy" (i.e. introduced) species are on the increase. This is true with most introduced species that have no nature predators in the area into which they are introduced.
--Migratory birds are moving further north each year. Warming global temperature is an obvious major culprit here.
--Rare and endangered birds are getting rarer and more endangered. Ask any avid bird watcher.
My own observation correlate with these statements.
I would like to suggest that we leave "junk science" out the the discussion if it to be a serious one. If this is just another anti-nature thread I'll gladly ignore it.
-Eddie Vedder, "Smile"
As a very serious birder myself (spent the past weekend at the Spring meeting of the Alabama Ornithological Society), I am well aware of the many issues facing our avian population including non-native species, wind farms, unregulated building along our coastlines and habitat loss.
I have not read anything about neo-tropical migrants move further north each year, but I know that many migration patterns are seemingly changing. As an example, we are seeing a rise in western hummingbirds over-wintering here in Alabama. Whether this is due to climate change, habitat loss or something does not appear to be known at this time.
There is also a belief that the house or English sparrow population here in North America appears to be declining for some unknown reason. This is one of the weediest species around, so not many folks are crying about this.
tybird, I totally misunderstood. My bad and my sincere apology.
We seem to be getting an increase in Humming birds also, especially Anna's. I love them but the other day there were so many I told my wife, "Look at all those giant mosquitoes outside!" She loves to put out bird feeders. I've often heard it said that it's better to let them fend for themselves naturally. What's your take on that?
-Eddie Vedder, "Smile"
Why don't you tell that to the parents of the millions of dead children that died from Malaria in Africa and other 3rd world countries. Fuck Rachel Carson ! I hope it's real hot where she is.
And here are the facts.. It amazes me how so many people on the left ignore history and try to re write it for that matter.
Facts versus fears: DDT
Extract from the American Council on Science and Health publication "Facts Versus Fears" - Edition 3, June 1998. © American Council on Science and Health - all rights reserved.
DDT, 1962
Background
DDT (dichlorodiphenyltrichloroethane) was first synthesized in 1877,1 but it was not until 1940 that a Swiss chemist discovered that it could be sprayed on walls and would cause any insect to die within the next six months, without any apparent toxicity to humans.2 DDT’s effectiveness, persistence, and low cost (only 17 cents per pound) resulted in its being used in antimalarial efforts worldwide. It was introduced into widespread use during World War II and became the single most important pesticide responsible for maintaining human health through the next two decades. The scientist who discovered the insecticidal properties of DDT, Dr. Paul Müller, was awarded the 1948 Nobel Prize in Physiology and Medicine.3
The Scare
In 1962 Rachel Carson’s lyrical yet scientifically flawed book Silent Spring was released. The book argued eloquently but erroneously that pesticides, and especially DDT, were poisoning both wildlife and the environment and also endangering human health. The emotional public reaction to Silent Spring launched the modern environmental movement.4 DDT became the prime target of the growing anti-chemical and anti-pesticide movements during the 1960s. Reasoned scientific discussion and sound data on the favorable human health effects of DDT were brushed aside by environmental alarmists who discounted DDT’s enormous benefits to world health with two allegations: (1) DDT was a carcinogen, and (2) it endangered the environment, particularly for certain birds.
In 1969 a study found a higher incidence of leukemia and liver tumors in mice fed DDT than in unexposed mice.5 Soon, too, environmentalists were blaming the decline in populations of such wild bird species as the osprey and peregrine falcon on the contamination by DDT of their environment. A number of states moved to ban DDT, and in 1970 the U.S. Department of Agriculture announced a plan to phase out all but essential uses.6
The Reaction
Numerous scientists protested that the laboratory-animal studies flew in the face of epidemiology, given that DDT had been used widely during the preceding 25 years with no increase in liver cancer in any of the populations among whom it had been sprayed. And when the World Health Organization (WHO) investigated the 1969 mice study, scientists discovered that both cases and controls had developed a surprising number of tumors. Further investigation revealed that the foods fed to both mice groups were moldy and contained aflatoxin, a carcinogen.7 When the tests were repeated using noncontaminated foods, neither group developed tumors. In 1970 the National Academy of Sciences declared, “In little more than two decades, DDT has prevented 500 million human deaths due to malaria, that would otherwise have been inevitable.”8
Additionally, the evidence regarding the effect of DDT on eggshell thinning among wild birds is contradictory at best. The environmentalist literature claims that the birds threatened directly by the insecticide were laying eggs with thin shells. These shells, say the environmentalists, would eventually become so fragile that the eggs would break, causing a decline in bird populations, particularly among raptors (birds of prey).
In 1968 two researchers, Drs. Joseph J. Hickey and Daniel W. Anderson, reported that high concentrations of DDT were found in the eggs of wild raptor populations. The two concluded that increased eggshell fragility in peregrine falcons, bald eagles, and ospreys was due to DDT exposure.9 Dr. Joel Bitman and associates at the U.S. Department of Agriculture likewise determined that Japanese quail fed DDT produced eggs with thinner shells and lower calcium content.10
In actuality, however, declines in bird populations either had occurred before DDT was present or had occured years after DDT’s use. A comparison of the annual Audubon Christmas Bird Counts between 1941 (pre-DDT) and 1960 (after DDT’s use had waned) reveals that at least 26 different kinds of birds became more numerous during those decades, the period of greatest DDT usage. The Audubon counts document an overall increase in birds seen per observer from 1941 to 1960, and statistical analyses of the Audubon data confirm the perceived increases. For example, only 197 bald eagles were documented in 194111; the number had increased to 891 in 1960.12
At Hawk Mountain, Pennsylvania, teams of ornithologists made daily counts of migrating raptors for over 40 years. The counts—published annually by the Hawk Mountain Sanctuary Association—reveal great increases in most kinds of hawks during the DDT years. The osprey counts increased as follows: in 1946, 191; in 1956, 288; in 1967, 457; and in 1972, 630.13 In 1942 Dr. Joseph Hickey—who in 1968 would blame DDT for bird population decline—reported that 70 per-cent of the eastern osprey population had been killed by pole traps around fish hatcheries.14 That same year, before DDT came into use, Hickey noted a decline in the population of peregrine falcons.15
Other observers also documented that the great peregrine decline in the eastern United States occurred long before any DDT was present in the environment.16,17 In Canada peregrines were observed to be “reproducing normally” in the 1960s even though their tissues contained 30 times more DDT than did the tissues of the midwestern peregrines allegedly being extirpated by the chemical.18 And in Great Britain, in 1969, a three-year government study noted that the decline of peregrine falcons in Britain had ended in 1966 even though DDT levels were as abundant as ever. The British study concluded that “There is no close correlation between the decline in population of predatory birds, particularly the peregrine falcon and the sparrow hawk, and the use of DDT.”19
In addition, later research refuted the original studies that had pointed to DDT as a cause for eggshell thinning. After reassessing their findings using more modern methodology, Drs. Hickey and Anderson admitted that the egg extracts they had studied contained little or no DDT and said they were now pursuing PCBs, chemicals used as capacitor insulators, as the culprit.20
When carefully reviewed, Dr. Bitman’s study revealed that the quail in the study were fed a diet with a calcium content of only 0.56 percent (a normal quail diet consists of 2.7 percent calcium). Calcium deficiency is a known cause of thin eggshells.21–23 After much criticism, Bitman repeated the test, this time with sufficient calcium levels. The birds produced eggs without thinned shells.24
After many years of carefully controlled feeding experiments, Dr. M. L. Scott and associates of the Department of Poultry Science at Cornell University “found no tremors, no mortality, no thinning of eggshells and no interference with reproduction caused by levels of DDT which were as high as those reported to be present in most of the wild birds where ‘catastrophic’ decreases in shell quality and reproduction have been claimed.”23 In fact, thinning eggshells can have many causes, including season of the year, nutrition (in particular insufficient calcium, phosphorus, vitamin D, and manganese), temperature rise, type of soil, and breeding conditions (e.g., sunlight and crowding).25
In the years preceding the DDT ban, the National Academy of Sciences,26,27 the American Medical Association, the U.S. Surgeon General,28 the World Health Organization,29 and the Food and Agriculture Organizations of the United Nations30 had been among those who spoke out in support of the continued use of DDT as a disease fighter and crop protectant.
In 1971 authority over pesticides was transferred from the Department of Agriculture to the newly formed Environmental Protection Agency (EPA). In April 1972, after seven months of testimony, Judge Edmund Sweeney stated that “DDT is not a carcinogenic hazard to man. . . . The uses of DDT under the regulations involved here do not have a deleterious effect on freshwater fish, estuarine organisms, wild birds, or other wildlife. . . . The evidence in this proceeding supports the conclusion that there is a present need for the essential uses of DDT.”31
Two months later EPA head William Ruckelshaus—who had never attended a single day’s session in the seven months of EPA hearings, and who admittedly had not even read the transcript of the hearings— overturned Judge Sweeney’s decision. Ruckelshaus declared that DDT was a “potential human carcinogen” and banned it for virtually all uses.32
Conclusion
The ban on DDT was considered the first major victory for the environmentalist movement in the U.S. The effect of the ban in other nations was less salutary, however. In Ceylon (now Sri Lanka) DDT spraying had reduced malaria cases from 2.8 million in 1948 to 17 in 1963. After spraying was stopped in 1964, malaria cases began to rise again and reached 2.5 million in 1969.33 The same pattern was repeated in many other tropical— and usually impoverished—regions of the world. In Zanzibar the prevalence of malaria among the populace dropped from 70 percent in 1958 to 5 percent in 1964. By 1984 it was back up to between 50 and 60 percent. The chief malaria expert for the U.S. Agency for International Development said that malaria would have been 98 percent eradicated had DDT continued to be used.34
In addition, from 1960 to 1974 WHO screened about 2,000 compounds for use as antimalarial insecticides. Only 30 were judged promising enough to warrant field trials. WHO found that none of those compounds had the persistence of DDT or was as safe as DDT. (Insecticides such as malathion and carbaryl, which are much more toxic than DDT, were used instead.) And—a very important factor for malaria control in less developed countries—all of the substitutes were considerably more expensive than DDT.35
[Insertion: See the human toll of not using DDT here. Ends.]
And what of the charges leveled against DDT? A 1978 National Cancer Institute report concluded—after two years of testing on several different strains of cancer-prone mice and rats—that DDT was not carcino-genic.36 As for the DDT-caused eggshell thinning, it is unclear whether it did, in fact, occur and, if it did, whether the thinning was caused by DDT, by mercury, by PCBs, or by the effects of human encroachment.16,37 And as recently as 1998 researchers reported that thrush eggshells in Great Britain had been thinning at a steady rate 47 years before DDT hit the market; the researchers placed the blame on the early consequences of industrialization.38
Regardless of whether DDT, exclusive of other chemicals, presented a threat to bird populations, it remains in the news. DDT has a long half-life, and residues sometimes persist for years in certain environments. Also, DDT is an organochlorine. Some organochlorines have been shown to have weak estrogenic activity, but the amounts of naturally occurring estrogens in the environment dwarf the amounts of synthetic estrogens.39 A recent article in the journal Environmental Health Perspectives suggested that the ratio of natural to synthetic estrogens may be as much as 40,000,000 to 1.40
In addition, Dr. Robert Golden of Environmental Risk Studies in Washington, DC, reviewed the research of numerous scientists and concluded that DDT and DDE (a breakdown product of DDT) have no significant estrogenic activity.41
The 1996 book Our Stolen Future speculated on a link between DDT and breast cancer, noting that DDE has been found in some breast tumors.42 Recently, charges have been made associating DDT and DDE with breast cancer—specifically, the finding that women with breast cancer had higher levels of DDE in their blood than did women without breast cancer.43 However, elevated blood DDE could quite plausibly be a result of the mobilization of fat from storage depots in the body due to weight loss associated with breast cancer. Breast cancer thus may be a risk factor for elevated DDE, rather than DDE’s being a risk factor for breast cancer.44
In a 1994 study published in the Journal of the National Cancer Institute, researchers concluded that their data did not support an association between DDT and breast cancer.45 The researchers did note that breast cancer rates are higher than the national average in many places in the northeastern United States; but the data also indicated that the higher levels could be accounted for by nonenvironmental factors among women living in these regions—factors such as higher socioeconomic status and deferral or avoidance of pregnancy, both of which increase the risks of breast cancer by up to twofold.45,46
In October 1997 the New England Journal of Medicine published a large, well-designed study that found no evidence that exposure to DDT and DDE increases the risk of breast cancer.47 In the accompanying editorial Dr. Steven Safe, a toxicologist at Texas A&M University, stated, “weakly estrogenic organochlorine compounds such as PCBs, DDT, and DDE are not a cause of breast cancer.”48 Dr. Sheila Zahm, deputy chief of the occupational epidemiology branch at the National Cancer Institute, agrees that the body of evidence that DDT can cause breast cancer “is not very compelling.”49
this is the most bizarre thread ...
OP posts an article celebrating rachel carson which also includes text to debunk the idea that a ban on ddt killed millions of children ... and then later goes on to blast carson for something that is debunked in the article he originally posted ...
:? :? :fp:
could it be the OP didn't actually read the article he posted!?? ...
yeah ... nice source there ...
Not today Sir, Probably not tomorrow.............................................. bayfront arena st. pete '94
you're finally here and I'm a mess................................................... nationwide arena columbus '10
memories like fingerprints are slowly raising.................................... first niagara center buffalo '13
another man ..... moved by sleight of hand...................................... joe louis arena detroit '14
I was also happy to observe at least three active osprey nests on Dauphin Island, a barrier island just off the Gulf coast of Alabama, this past weekend. The brown pelican population in same area seems to be doing well, and several peregrine falcons were noted on the island. All three species were heavily affected by DDT.
Not today Sir, Probably not tomorrow.............................................. bayfront arena st. pete '94
you're finally here and I'm a mess................................................... nationwide arena columbus '10
memories like fingerprints are slowly raising.................................... first niagara center buffalo '13
another man ..... moved by sleight of hand...................................... joe louis arena detroit '14
And as important , that some lessons are learned and applied. from the what led to the spill to affects of cleanup, etc.
Not today Sir, Probably not tomorrow.............................................. bayfront arena st. pete '94
you're finally here and I'm a mess................................................... nationwide arena columbus '10
memories like fingerprints are slowly raising.................................... first niagara center buffalo '13
another man ..... moved by sleight of hand...................................... joe louis arena detroit '14
Good to know. Thanks!
-Eddie Vedder, "Smile"
Quelle surprise!
@ satansbed
At least I admit when I make a mistake. All you seem to do is troll my post and make smart ass comments. Nothing better to do?
Here is stossell on the subject