There’s an interesting blog post and maps from the Land Art Generator Initiative that shows the land surface area per region that would be required to power the world with solar panels or wind power. The solar map compares the energy demands of 1980, 2008, and a projection for 2030. It’s a surprisingly small land area when seen on a global context. The wind power map measures area in more linear form, and projects the capacity along the coasts.
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Wind power is a good source of electricity but it also takes up lots of space just like solar power plants.;’*