How should human beings deal with the problem of global warming? NASA climate modelers Igor Arenov and David Lind once proposed a bold plan in a paper in the Journal of Climate Change, which is to turn the vast Sahara desert into a lush forest. This idea looks perfect on the surface, but in fact it has a big "bug".

First, let's set aside how much effort it took to turn the Sahara into a forest. It's just that the price when it becomes a forest is unbearable for human beings. So why not turn it into a forest? Isn't the more forests the better? What if we turned all the deserts on Earth into forests? OK, that and more is exactly what we are going to talk about today. Let’s get started!

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