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It regulated through thousand year cycles of increased Ice cover.
But how did an ice age start when it was too hot? What triggered it? Did the solar output of energy or something change?
We Don't....there is no mood to repair.
That isn't exactly correct. We do have ways to cultivate algee and come up with other ways to remove CO2. It would be easier to reduce it bwfore it got too far out of control, but I think humans would be able to come up with something. Teh problem is that there is no money to be made by gathering C02 without a carbon market where you need to pay to polute, but can get money back by cleaning up the environment.
Die....but not everyone...heh.
As long as it isn't me, I won't have a problem with that. 6.2 billion people breathing has to create some level of CO2 by itself. The temperature could go up another 20F or an ice age could happen and I would be fine. Or at least could survive longer than the other people looking for food.
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