Dr. Bruce Ames (a biochemistry professor at the University of California) pointed out in 1987 that we ingest in our diet about 1.5 grams per day of {natural} pesticides. Those foods contain 10,000 times more, by weight, of {natural} pesticides than of man-made pesticide residues.
More than 90% of the pesticides in plants are produced {naturally} by the plants, which help protect them from insects, mites, nematodes, bacteria, and fungi. Those natural pesticides may make up 5% to 10% of a plant's dry weight, and nearly half of them that were tested on experimental animals were carcinogenic. Americans should therefore feel unconcerned about the harmless, infinitesimal traces of synthetic chemicals to which they may be exposed.
The highly publicized traces of synthetic pesticides on fruits and vegetables worried some people so much that they began to favor "organically produced'' foods, thinking that they would not contain any pesticides. Most people are not aware that organic gardeners can legally use a great many pesticides, so long as they are not man-made.
They can use nicotine sulfate, rotenone, and pyrethrum (derived from plants), or any poisons that occur naturally, such as lime, sulfur, borax, cyanide, arsenic, and fluorine.
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