I think I see what you mean. There's just so much we don't know at this point, and so many chemicals that we are exposed to even in small amounts, I could total

I think I see what you mean. There's just so much we don't know at this point, and so many chemicals that we are exposed to even in small amounts, I could totally see some of these diseases being brought on by something common we've never considered. Or by some combination of things that may not be that harmful on their own.