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The sun is doing most of the warming work, we have just tightened our greenhouse! There's the order of magnitude you needed. Also the troposphere, other side of the co2 window-pane, is getting correspondingly colder..


> The sun is doing most of the warming work

What other heat source would there be other than geothermal or fission?

> Also the troposphere, other side of the co2 window-pane, is getting correspondingly colder..

As a result of trapping more heat inside I presume?




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