Conservationists take drastic measures to save coral reefs from climate change

Coral reef ecosystems support a quarter of all marine life on Earth, but they are slowly dying under the relentless stresses of overfishing, pollution, disease and climate change. As part of our ongoing series “Saving Species,” William Brangham dives into the steps that scientists are taking to try to preserve the corals that remain. Stream your PBS favorites with the PBS app: https://to.pbs.org/2Jb8twG Find more from PBS NewsHour at https://www.pbs.org/newshour Subscribe to our YouTube channel: https://bit.ly/2HfsCD6 Follow us: TikTok: https://www.tiktok.com/@pbsnews Twitter: http://www.twitter.com/newshour Instagram: http://www.instagram.com/newshour Facebook: http://www.pbs.org/newshour Subscribe: PBS NewsHour podcasts: https://www.pbs.org/newshour/podcasts Newsletters: https://www.pbs.org/newshour/subscribe