Rainforests sustain all life on the planet, provide 1.6 billion people with the necessities of life, store millions of tons of carbon, regulate the global climate, and create cooling air and rains that support life on Earth. They are home to indigenous peoples and forest communities that have served as their guardians for many generations. If protected and restored, rainforests can provide an indispensable contribution to sustainable development. Instead, they are at grave risk.