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Geotherma
Two trillion tons of carbon dioxide has to be taken out of the atmosphere over next couple of hundred years. The grantham foundation, that's all we do with our private investments,. Our venture capital is focusing on carbon dioxide extraction biologically and every other method that we can get at. But that needs a huge amount of energy. However you do it, you're going to need a lot of enegy. And what are the probabilities? I think there's probably 50 50 that fusion, in the next few decades, will come out with a aviable engineering system - but maybe not cheap enough. We wouldn't need erfusion or geothern any one of those three will give