i don`t see the environmental pressure exerted on the dna of plants and animals by things such as the runoff in the article above, producing advantagious results. i.e. a better organism.
when the environment of a species is toxified the species adapts and remains the same species or it dies.
otherwise there would be evidence for such a response.
it would be the most significant survival mechanism in genetic existance.
yet there is no evidence.