The combination of climate change, deforestation, pollution, overfishing, and more have produced a biodiversity crisis. On a bad day, 200 species go extinct. If we project current rates, by century’s end, 50% of all large mammals and marine life will disappear. And by 2050, 90% of coral reefs—which are home to 25% of the world’s biodiversity—could be gone. But all is not lost yet, as some of today's best minds…