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Global temperatures on track for 3-5 degree rise by 2100: U.N.

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I just read the following on another forum talking about the long term prospects for Earth:

"...And we’re cooling off down below at a far faster rate (about 5x) than the sun is warming up.

The point is… in about a billion years… maybe 1.5 (we’re still measuring and guessing to be honest)… the Earth will be very cold, with most of our remaining water trapped permanently below the surface as part of the lithosphere. We won’t be much better off than mars is now. And as the dynamo at the center of the earth wanes (and it is), the magnetic field that keeps the sun from punishing our atmosphere worse than it already does will no longer be up to the job… so not only will the crust beneath our feet by cold, but the air will be a looooot thinner (and thus also cold.) Radiation will get through much more easily and you’ll be lucky to see an equatorial summer’s afternoon reach 10C. Of course, dry as as a bone as it would be, you probably wouldn’t see any liquid water anyways… not even at high noon."

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So ... Could Global Warming end up being a good thing for planet Earth long term?

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