Over 100 million animals are burned, crippled, poisoned and abused in U.S. labs every year.
According to the Humane Society, registration of a single pesticide requires more than 50 experiments and the use of as many as 12, 000 animals.
In tests of potential carcinogens, subjects are given a substance every day for two years. Others tests involve killing pregnant animals and testing their fetuses.
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