In 201https://www.bbc.com/future/article/20200109-is-it-wrong-to-be-hopeful-about-climate-change

8, a 30-minute documentary was premiered in San José, Costa Rica’s capital and my hometown. The film followed the early efforts of a handful of marine biologists who are fighting coral bleaching. They grow tiny bits of coral in underwater nurseries and once they’re big enough move them back to the reef, hoping to restore it.

Their pace is slow, possibly too slow to keep up with bleaching due to climate change. Warming waters swipe entire reefs in a matter of weeks. The biologists need months to nurture enough corals to restore a couple of square meters. Reef restoration seems like an impossible task, but they are relentless. It must be…