Forests can be destroyed quickly. Regrowth happens much, much slower. But around the world, people are working to help it happen. In the Peruvian Amazon, illegal gold mining damaged forests and poisoned the ground. Now scientists work to change this wasteland back to wilderness. Almost 5,000 kilometers north are former coal mining lands across Appalachia, in the American state of West Virginia. Workers there tear out old trees that never put down deep roots. They make the soil better so native trees can grow there once more. In Brazil, a plant business owner grows different kinds of young plants to help reconnect forests along the country’s Atlantic coast. Such efforts also help endangered animals, like the golden lion tamarin. Rebuilding woodland requires patience. It can take several decades or longer for forests to regrow as true habitats.