Environment

NPR -  Record levels of ocean heat are causing a second worldwide mass bleaching event on coral reefs in this decade. Corals are some of the world's most diverse ecosystems, and bleaching can kill them. Coral death would impact thousands of marine species as well as human communities. With mass bleaching expected to get worse as the climate keeps warming, scientists are looking for ways to help them survive. Some scientists have developed "super corals" that can handle heat better, NPR's Lauren Sommer reports. They want to use these corals to restore reefs hit by climate change. But they warn that this isn't a "get out of jail free" card, and these corals can only buy a little more time for reefs to hang on until humans can slow climate change.