Take into consideration the UN's Sustainable Development Goals (SDGs) of ending hunger, promoting good health, providing access to clean water, and combating climate change. Not one of these is achievable without a thriving diversity of life. Clean water—the essence of life—depends on ecosystems that filter, store, and regulate it. Forests capture rainfall and recharge aquifers; wetlands cleanse runoff and buffer floods. Yet, across the world, we are draining, paving, and poisoning these systems. When we degrade watersheds, we sever the veins through which life flows. The SDG for clean water (SDG 6) is only attainable if we protect the biodiversity within these landscapes.