Grist relies on the support of generous readers like you. Donate today to keep our climate news free. All donations matched!

If we could just get everyone in the world to pack in a little tighter, we'd have a hell of a lot more open space to work with. Imagine the possibilities! We could pack everyone into the Midwest, fill Canada with wind turbines, and leave everything else for wildlife. Okay, maybe that's not realistic, but the point is that dense living frees up a lot of the Earth's surface area.

Grist thanks its sponsors. Become one.