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Tuesday 27 May 2014

KNOW THE LIST OF GREAT WORKS ,CRITICISM OF RACHEL CARSON:AMERICAN MARINE BIOLOGIST

List of works

Criticisms of environmentalism and DDT restrictions

Carson and the environmental movement were — and continue to be — criticized by some conservatives and libertarians as well as chemical-industry trade groups, who argue that restrictions placed on pesticides, specifically DDT, have caused tens of millions of needless deaths and hampered agriculture (and, implicitly, that Carson bears responsibility for inciting such restrictions).[80][81][82]

Carson's vocal expressions of concern about the human health effects and environmental impact of DDT has come under the most intense fire. Political scientist Charles Rubin was one of the most vociferous critics in the 1980s and 1990s, though he accused her merely of selective use of source and fanaticism (rather than the more severe criticism Carson received upon Silent Spring's release).

In the 2000s, however, criticism of the real and alleged ban(s) of DDT her work prompted became much more intense.[83][84]In 2009, the libertarian think tank Competitive Enterprise Institute set up a website asserting "Millions of people around the world suffer the painful and often deadly effects of malaria because one person sounded a false alarm. That person is Rachel Carson."[84][85] A 2012 review article in Nature by Rob Dunn[86] commemorating the 50th anniversary of Silent Spring prompted a response in a letter written by Anthony Trewavas and co-signed by 10 others, including Christopher LeaverBruce AmesRichard Tren and Peter Lachmann, who quote estimates of 60 to 80 million deaths "as a result of misguided fears based on poorly understood evidence".[87]

Biographer Hamilton Lytle believes these estimates unrealistic, even assuming that Carson can be "blamed" for worldwide DDT policies.[88] John Quiggin and Tim Lambert have written that "the most striking feature of the claim against Carson is the ease with which it can be refuted." DDT was never banned for anti-malarial use,[89] (its ban for agricultural use in the United States in 1972 did not apply outside the US or to anti-malaria spraying;[90] the international treaty that banned most uses of DDT and other organochlorine pesticides — the 2001 Stockholm Convention on Persistent Organic Pollutants — included an exemption for DDT for the use of malaria control until affordable substitutes could be found.[83]) Mass outdoor spraying of DDT was abandoned in poor countries subject to malaria, such as Sri Lanka, in the 1970s and 1980s, not because of government prohibitions, but because the DDT had lost its ability to kill the mosquitoes.[83] (Because of insects' very short breeding cycle and large number of offspring, the most resistant insects that survive and pass on their genetic traits to their offspring replace the pesticide-slain insects relatively rapidly. Agricultural spraying of pesticides producesresistance to the pesticide in seven to ten years.[91])

Consequently, some experts have argued that restrictions placed on the agricultural use of DDT have increased its effectiveness as a tool for battling malaria. According to pro-DDT advocate Amir Attaran the result of the 2004 Stockholm Convention banning DDT's use in agriculture "is arguably better than the status quo ... For the first time, there is now an insecticide which is restricted to vector control only, meaning that the selection of resistant mosquitoes will be slower than before."[92] But though Carson's legacy has been closely tied to DDT, Roger Bate of the DDT advocacy organization Africa Fighting Malaria warns that "A lot of people have used Carson to push their own agendas. We just have to be a little careful when you're talking about someone who died in 1964."[93

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