Africa Is Building a 5,000-Mile Wall to Stop the Sahara

Africa is spending billions on one of the most ambitious environmental megaprojects ever attempted: a giant green barrier designed to stop the Sahara Desert from spreading farther south. The Great Green Wall stretches across the continent and aims to restore millions of acres of degraded land, protect communities, and create jobs in regions threatened by drought and desertification. Scientists say the project could help stabilize local climates, improve food security, and store huge amounts of carbon while transforming landscapes that have struggled for decades. But with harsh conditions, funding challenges, and enormous distances involved, turning this vision into reality is proving to be one of the toughest engineering and environmental challenges on Earth. Join us as we explore the multi-billion-dollar project trying to stop the world's largest desert and discover whether humanity can actually push back against the Sahara.