Pesticides, especially persistent pesticides, must be avoided to avoid killing wildlife.
2.
A few years ago, a single application of a persistent pesticide might have given 25 to 30 years of protection if the barrier was undisturbed.
3.
Wood-degrading fungi are particularly effective in breaking down aromatic pollutants ( toxic components of petroleum ), as well as chlorinated compounds ( certain persistent pesticides; Battelle, 2000 ).
4.
The Persistent Organic Pollutants Review Committee of the Stockholm Convention on Persistent Organic Pollutants considers the use of lindane in agriculture as largely redundant with other, less toxic and less persistent pesticides.
5.
Improvements in water quality and subsequent fish stocks, in combination with the ban on the use of certain persistent pesticides have meant that otters have now returned to the Trent system, having been absent as recently as the 1980s.
6.
In the 1950s, he noted, millions of acres were sprayed with DDT . This suppressed but did not stop the gypsy moth, and inspired Rachel Carson's landmark work, " Silent Spring, " damning the environmental damage caused by persistent pesticides.
7.
All organic farms _ which produce about 2 percent of the nation's produce _ must be " free of all toxic and persistent pesticides and fertilizers " for the past three years, said Katherine DiMatteo, executive director of the Organic Trade Association, a national trade group for organic growers.
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