About two decades ago, African nations launched an audacious plan: a 7,700km “Great Green Wall” to hold back the Sahara Desert’s southward march. Yet years passed and progress was stalled ...

The project will see a 4,722-mile green wall that will aim to restore 100 million hectares of degraded land, capture around 250 million tonnes of carbon by 2030, and create roughly 10 million jobs.