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>now, to be clear, i don't disagree that the planet is warming. i'm just skeptical that an increase in co2 is the main culprit.

Do you have any alternative possible explanations for what is causing the temperature rise? And what do you think of the ones that have been proposed, like increased solar radiation?

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i do not. as i pointed out, it's a classic complex mechanism that might not be able to be attributable to one single factor.

i guess i'm also not convinced that the warming of the past 150 - 200 years is out of the range of normal variation (esp. with the latest warming pause) when looking at geologic times. i know it's a difficult thing to prove since constructing geologic GLOBAL temperature is very difficult, but i just don't know.

it does seem like the increase of carbon in the atmosphere is abnormal, if not entirely unprecedented.

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