Degradation of many (most?) chemicals in the environment approximates a first order rate equation:
d(C)/d(t) = kC
Where C is concentration and t is time. Expecting C to get to zero is not science.
Dick
" Any discovery made by the human mind can be explained in its essentials to the curious learner." Professor Benjamin Schumacher talking about teaching quantum mechanics to non scientists. "For every complex problem there is a solution which is simple, neat and wrong." H. L. Mencken
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