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Unnatural causes


I detect a tiny flaw in the argument of Chris Carley of Greenacres that climate change is only ever a result of natural causes (NCE 23 November).

Man's activities, especially since the Industrial Revolution, have not been 'natural' in the sense that it's always been like that. The sustained growth in fossil fuel burning in particular is an unnatural factor in the natural balance.

Man has always smoked, but we now know it damages health. 'Carry on as before' cannot be a sensible option. Wake up Mr Carley or you'll find you are living in Parchedacres before you know it!

David Rothwell, 7 The Spinney, London Road, Cheam, Surrey SM3 8JG

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