Dr. Tyrone Hayes, PhD.

This page showcases the work of Dr. Tyrone Hayes, a Harvard graduate, who is currently is a professor of Integrative Biology at University of California Berkeley . He studied the effects of the agricultural chemical Atrazine on the physiology and behaviour of frogs and repeatedly observed serious endocrine disrupting effects on their reproductive anatomy and behaviours. He refused to keep those results quiet when the corporation Syngenta (formerly Novartis) tried to bury his work. 

Unfortunately frogs are not the only victims of chemical endocrine disruption. Dr. Hayes has become a vocal activist for change due to the seriousness of his and other scientists' research results, and also because people of color and disadvantage are usually more exposed to these chemicals than are other groups.
https://vcresearch.berkeley.edu/faculty/tyrone-b-hayes

   Dr. Haye's personal history is here: http://www.idvl.org/sciencemakers/Bio23.html

   Here is the Wikipedia entry with a list of Dr. Hayes' publications  https://en.wikipedia.org/wiki/Tyrone_Hayes