How Ancient Ice Proves Climate Change Is Real

PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateOKAY ↓ More info and sources below ↓ Earth’s climate is changing in a big way, and it’s because there s more carbon dioxide in the atmosphere than at any point in our species’ history. But Earth’s climate has changed before. How do we know that this time we’re the cause? We know thanks to tiny bubbles of ancient atmosphere trapped in ice. #climatechange #globalwarming Thanks to Dr. Jeff Severinghaus and the Scripps Institution of Oceanography References: https://sites.google.com/view/ice-cores-climate-change/home Special thanks to our Brain Trust Patrons: AlecZero Bob Rosset Brent M. Diego Lombeida ----------- Join us on Patreon! https://patreon.com/itsokaytobesmart Twitter http://www.twitter.com/DrJoeHanson http://www.twitter.com/okaytobesmart Instagram http://www.instagram.com/DrJoeHanson http://www.instagram.com/okaytobesmart Merch https://store.dftba.com/collections/its-okay-to-be-smart Facebook https://www.facebook.com/itsokaytobesmartpbs/