Question: Can you spray a hormone, e.g. testosterone, over an environment and create effects?

Saffron Whitehead answered on 13 Jun 2015:

Essentially yes although I don’t think an experiment with testosterone has ever been done! However we are surrounded by chemials that can mimic or antagonise hormone action and these are called endocrine disrupters. Pesticides, insectides, plastics, cleaners, make up etc.etc. If they get into the food chain they can have effects. Any example oestrogens secreted in urine by women on the pill get into sewage and fish living in rivers near sewage outlets become feminized – known as intersex fish. Another example is with alligators in Florida exposed to a pesticide spill. They stopped breeding or were not successful breeders and males had very small penises!
There are now firmer controls of many of these chemicals.