Let's look at megascale reforestation. Great Green Walls are "so-big-you'll-see-them-from-orbit" terraforming efforts intended to stop desertification. The largest such projects are the northern and southern edges of the Sahara, northern China along the edge of the Gobi, and a wildlife corridor in India's Aravalli mountains.

Welcome back to Terraforming Earth. Let's look at new tech for oil spill cleanup.

Welcome back to my series on Terraforming Earth. Let's talk getting the plastic out of the ocean.