UN: Urgent Climate Action Required to PREVENT the Greening of the Sahara Desert

6000 years ago during the Holocene Climatic Optimum the Sahara desert was covered in lakes and vegetation. All this went away when the world cooled. Some of the poorest people in the world, descendants of survivors of the great drying, struggle to survive by scratching a living in the Sahel, the marginal land on the southern edge of the Sahara.