Greenhouse gases are only one part of global warming. The other is the sun. Now obviously we cannot reduce the sun's output, but would it be possible to deflect some of the radiation ?
After all, we all know that cloud reduces the heat of the sun at ground level, and that during a solar eclipse, observers report a marked drop in temperature. So would it be feasible to construct artificial clouds, or even to put large satellites into orbit (perhaps gas-filled balloons) to cause artificial solar eclipses ?
I don't like the idea of having to live on an ark.
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