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I can respect that, but I don't know if it's possible to expect such an issue not to be politicised - The climate, ecology and economics are all equally complex dynamic systems that no-one can claim to fully understand, yet governments and businesses across the globe employ economists who will gladly politicise their own crystal ball readings without anyone batting an eyelid. Why should more robust, physical science be any different?
So, I say, if there are some people who believe an approaching doomsday is coming wish to call for action, then let them - it can do us no harm to tread carefully in these respects. There will be those who abjectly disbelieve any such thing is ever possible, and, as usual, the reasonable majority will remain in the middle. I just hope that if the evidence does ever show that the global climate is changing because of us, that we wont be too late to stop and reverse it.
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