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  Air capture
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ContributorArmyDem 
Last EditedArmyDem  Mar 31, 2008 09:16am
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News DateSunday, March 30, 2008 03:15:00 PM UTC0:0
DescriptionRealClimate has a good introductory post on air capture, which they explain as:

The idea would be to let people emit the carbon dioxide at the source but then capture it directly from the atmosphere at a separate facility.

This is going to be a relatively expensive and complicated strategy for decades — and, of course, you need a place to put the carbon dioxide. That said, a lot of work is going on to see if one can do air capture driven by heat.

Why does that matter? The world has a LOT of zero carbon waste heat not currently being used for anything. Indeed, U.S. thermal power plants alone throw away in waste heat as much energy as Japan uses for every purpose! That’s more than 20 quads. And that doesn’t even count the heat thrown away in industrial processes. Now the smartest thing to do with that heat for the next few decades is obviously either generate electricity with it or use it for heating buildings or industrial processes.
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