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Old 11-06-2021, 06:24 AM   #426 (permalink)
oil pan 4
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Quote:
Originally Posted by aerohead View Post
We were at 280 ppmv before the Industrial Revolution kicked off.
Currently, climate sensitivity, at a 'doubling' of carbon dioxide ( 560 ppmv ) will lead to the 3-C world ( 5.4 F warmer ).
Presently we're at around 412-ppmv.
Any use of the word 'life', in the context of justifying no climate action, would require some context.
Conditions supporting only single-cellular life on Earth may be a turn-off for some. Although it would be 'life.'
Have to get well above 1,600 ppm for that.
So looks like we are barely 1/4 of the way there.
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