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Originally Posted by Halcyon Dayz
Typical jungle soil isn't that rich.
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But the aboveground parts oaf most rainforests contitute a massive quantity of biomass, which would all have to be transported along with water to establish a rainforest large enough to effect world CO2.
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And the Sahara is not all sand. Some parts are very fertile, it just lacks water.
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How much water and biomass will be needed? And how large an area are we talking about?
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Someone (?) once proposed to pump the discharge from the Amazon river to the Sahara.
That would be as much as 200,000 tonnes of (muddy) fresh water per second.
So there people thinking about such technologies.
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There are also people thinking about trans-Atlantic train tunnels, space elevators, floating cities, terraforming, and Dyson Spheres. But they aren't going to happen anytime soon, and some never will. The amount of energy alone needed to pump that much water halfway around the world makes this one an unlikely prospect ever to become real.
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