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"Bruce Sinclair" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > In article <[EMAIL PROTECTED]>, "Jim Webster" <[EMAIL PROTECTED]> wrote: > >> To be fair, that's a bit simplistic. > > > >The laws of thermodynamics are. And there is no appeal. > > Indeed. But this was a point about dessertification, not fertiliser. The > cause/effect connection is not as clear as was being suggested. More than one > thing is operating here. but there always is more than one effect, but desertification is basically the result to too little water and too little fertiliser combined with too much being extracted. Throughout history there are large areas that have been fertile but have been rendered desert not by climate change but by passing armies destroying the infrastructure, the mongols were classic exemplars of this Jim Webster
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