The Great Oasis
Burkhard Bilger writes on how global warming is causing the world’s deserts to grow, and how reforestation schemes like the Great Green Wall may help.
"It used to be much wetter here when I was a boy," the farmer told Burkhard Bilger as their SUV lurched up a gravel switchback in Oman. "You never had to buy fodder for your goats." A Dutch inventor had come to test a tree-planting device, looking for the last baobab in the northern mountains.