So do humans... DEET in bug spray, stimulants in Red Bull, a bazillion things in cigarettes, **** in Coke, crap in McDonald's, pills pills pills pills, mercury from the weekly sushi fix, fertilizers and pesticides on the lawns, pollutants from vehicles and in the atmosphere, I'd hazard a guess that we're just as polluted as Fido and Morris.
I am glad they're studying this. I do feel there is an overuse in chemicals that we can do without.