Reversing the process of desertification is a winner on many levels, not only because it provides more arable land, but also because it absorbs carbon from the atmosphere, addresses one of the greatest concerns of climate change (the growth of deserts in lower latitudes), and increases biodiversity. With most forms of geoengineering there are too many unknown consequences, and with emission reductions we know more about the dire economic consequences than the ecological advantages. Hence, mor...
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