Atrazine can change gender of frogs

From 2010. Sometimes people reference this study, or Alex Jones takes it out of context.

Atrazine, one of the world’s most widely used pesticides, wreaks havoc with the sex lives of adult male frogs, emasculating three-quarters of them and turning one in 10 into females, according to a new study by University of California, Berkeley, biologists.

The 75 percent that are chemically castrated are essentially “dead” because of their inability to reproduce in the wild, reports UC Berkeley’s Tyrone B. Hayes, professor of integrative biology.

“These male frogs are missing testosterone and all the things that testosterone controls, including sperm.

Source: http://news.berkeley.edu/2010/03/01/frogs/

EPA says atrazine threatens wildlife

1. Atrazine likely poses a threat to both land and water animals. 
2. Atrazine is banned in Europe but found in the drinking water of over 27 million people in the U.S. (About 8%.)
3. Atrazine is a potent endocrine disruptor. One study shows it changes the sex of frogs. 
4. EPA found that mammals are exposed to 198 times more atrazine than the “level of concern for chronic risk” and fish are exposed to 62 times that level.

Source
EWG.
Nature study of frogs changing sex.