We always say that we can assess an environment by checking out the local frogs, since everything permeates their skin so easily. They're like living environmental barometers. But we shouldn't sell ourselves short, because as it turns out, so are we. Years ago I read about a mother who attempted to keep her child free of any kinds of toxic chemicals by avoiding everything possible, keeping to an organic lifestyle, etc. only to find out that when his blood was tested, it still registered a bunch of fire retardants and other substances that horrified her.