How rolling sand dunes are creeping up on last remaining oases on edge of Sahara

In western Chad, villagers are desperately trying to hold back the sand as the climate crisis wreaks havoc on one of the hottest countries in the worldOn the ochre sands of Kanem, the neat vegetable gardens and silver-green palm trees of Kaou oasis stand out, incongruous in this desert province of 70,000 sq km in western Chad.Oases such as this, on the edge of the Sahara, have sustained human life in the world’s deserts for thousands of years. Globally, an estimated 150 million people rely