Destruction of habitat—as a result not just of climate change, but industrial agriculture, deforestation, and urbanization as well—is driving native species to the brink. Simply planting trees, if they’re non-native, may not help much and can even make the situation worse. In contrast, native trees and shrubs provide a food forest for birds and insects that would otherwise go hungry. It seems like a small gesture in the face of the cataclysmic trends converging on us, but at least it’s a push in the right direction: it restores ecosystems and makes them more resilient. That way, when civilization goes, it might possibly leave something behind other than a wasteland.