History: May 15, 1963, President’s council vindicates Rachel Carson, warns of pesticide dangers

May 15, 2009

President John F. Kennedy’s Science Advisory Council (PSAC) studied Rachel Carson’s best-selling book, Silent Spring, checking it for scientific accuracy.  Kennedy read the book himself, but sought expert advice before doing anything.  Meanwhile, DDT manufacturers bankrolled an extensive public relations campaign claiming DDT was safe, and suggesting Carson was less than a careful writer and scientist.

On May 15, 1963, PSAC reported:  Carson was right. Pesticides were being misused, even abused, and some pesticides like DDT presented significant threats to the environment.  “The Use of Pesticides” recommended increased government scrutiny of the safety and efficacy of pesticides, and vindicated Carson’s reporting of science findings.

Library of Congress described the event and its import in America’s Library, “Meet Amazing Americans”:

The Consequences of Silent Spring

Reading Carson’s book changed many people’s ideas about the environment and inspired some to take action. People wrote to their representatives in congress and asked them to do something about the misuse of pesticides. When several senators created a committee to research environmental dangers, they asked Carson to speak to them about pesticides. Carson recommended that the government regulate and reduce pesticide use, and that it ban the most toxic pesticides. She said that a citizen of the United States had the right “to be secure in his own home against the intrusion of poisons applied by other persons.”

President Kennedy understood the importance of Carson’s book. He asked his Science Advisory Committee to research Carson’s claims in Silent Spring. In 1963 the Committee released a report called “The Uses of Pesticides.” It supported Silent Spring. Environmental activists continued to push the government to regulate pesticides. Changes in federal law in 1964 required companies to prove that something did not cause harm before they could sell it. In 1972, activists pushed for and won a ban on DDT, the pesticide that started Carson’s research for Silent Spring. And in 1970 the Environmental Protection Agency (EPA) was created “in response to the growing public demand for cleaner water, air and land.” Who knows what the world would be like today if Rachel Carson had not written Silent Spring?

 
Some radicals argue that Rachel Carson’s legacy is tarnished, that she was in error about DDT, and somehow that translates into many deaths as a result of malaria, as if DDT worked against malaria parasites themselves.  With such a strong propaganda campaign of disinformation plaguing us today, we do well to pause and remember that Carson’s work was subjected to intense, careful scrutiny by scientists from the start.  Carson’s reporting was accurate, and her legacy of environmental protection and saving lives should be celebrated.

Teaching Resource: Role play simulation, “Advisory Committee on Pesticides 1963,” (see especially the list of historic and scientific resources available for study and for the simulation, from Douglas Allchin).

Rachel Carson in the ocean in Florida, 1955 - photo, R. G. Schmidt, USFWS

Rachel Carson in the ocean in Florida, 1955 – photo, R. G. Schmidt, USFWS

Updates, January 2013:

More, from 2013:

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100 things about DDT: Dissecting #10

November 8, 2007

This is another in an occasional series of posts dissecting the claims made by JunkScience purveyor Steven Milloy’s “100 things you should know about DDT.” What I find in this list is a lot of deception, misleading claims, and general unjustified vitriol. In this post I’m looking at Milloy’s point #10.

Milloy said:

10. Rachel Carson sounded the initial alarm against DDT, but represented the science of DDT erroneously in her 1962 book Silent Spring. Carson wrote “Dr. DeWitt’s now classic experiments [on quail and pheasants] have now established the fact that exposure to DDT, even when doing no observable harm to the birds, may seriously affect reproduction. Quail into whose diet DDT was introduced throughout the breeding season survived and even produced normal numbers of fertile eggs. But few of the eggs hatched.” DeWitt’s 1956 article (in Journal of Agriculture and Food Chemistry) actually yielded a very different conclusion. Quail were fed 200 parts per million of DDT in all of their food throughout the breeding season. DeWitt reports that 80% of their eggs hatched, compared with the “control”” birds which hatched 83.9% of their eggs. Carson also omitted mention of DeWitt’s report that “control” pheasants hatched only 57 percent of their eggs, while those that were fed high levels of DDT in all of their food for an entire year hatched more than 80% of their eggs.

Considering Carson’s careful citing of studies on all sides of the issue, and her use of sources dating back 30 years and more, it would be difficult for her to have “represented the science of DDT erroneously.” Carson got the science right. Milloy doesn’t even get the quote of Carson right, however, deleting her main point, and editing it to set up a straw man argument which misleads unwary readers.

Carson represented the science faithfully. Milloy simply dissembles in his accusation that she got it wrong.

In fact, Carson offered more than 50 pages of citations to studies, virtually everything available on DDT and the other chemicals she wrote about, up to the time of publication. Carson had started working on the issue in 1948, and worked almost solely on the work that became Silent Spring between 1959 and the book’s publication. None of the studies she cited has been retracted. Most of the studies were determined to be accurate in follow-up studies.

I discuss this at some length, below the fold. Read the rest of this entry »