Global coral reef bleaching event is largest on record, report says

New data from the National Oceanic and Atmospheric Administration has scientists ringing alarm bells about the health of the world's oceans. Seventy-seven percent of the world's coral reefs have experienced "bleaching-level heat stress" over the last 22 months. Derek Manzello, coordinator of NOAA's Coral Reef Watch program, joins CBS News to dive deeper into the research. CBS News 24/7 is the premier anchored streaming news service from CBS News and Stations that is available free to everyone with access to the internet and is the destination for breaking news, live events, original reporting and storytelling, and programs from CBS News and Stations' top anchors and correspondents working locally, nationally and around the globe. It is available on more than 30 platforms across mobile, desktop and connected TVs for free, as well as CBSNews.com and Paramount+ and live in 91 countries. Subscribe to the CBS News YouTube channel: https://youtube.com/cbsnews Watch CBS News: https://cbsnews.com/live/ Download the CBS News app: https://cbsnews.com/mobile/ Follow CBS News on Instagram: https://instagram.com/cbsnews/ Like CBS News on Facebook: https://facebook.com/cbsnews Follow CBS News on Twitter: https://twitter.com/cbsnews Subscribe to our newsletters: https://cbsnews.com/newsletters/ Try Paramount+ free: https://paramountplus.com/?ftag=PPM-05-10aeh8h For video licensing inquiries, contact: licensing@veritone.com