re: #171 ggt
IIRC, The DDT kills birds was never proven in double-blind controlled tests. I love to see documentation as I did a search some years ago and couldn’t find any.
You can educate me if you wish, but I have not seen a refutation of this, nor of the fact that there has been a remarkable resurgence of birds of prey since DDT was abandoned.
In case you are partially informed; DDT does not kill birds, it makes them produce thin eggshells which are prone to breakage and therefore reduces reproduction. Hence the analogy of a specific, if subtle, early gestation impact.