It’s time for the PBSDS Annual Survey! We want to hear from YOU Share your feedback here: www.pbsresearch.org/c/r/IOTBS_YTvideo ↓↓↓ 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: 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! patreon.com/itsokaytobesmart Twitter www.twitter.com/DrJoeHanson www.twitter.com/okaytobesmart Instagram www.instagram.com/DrJoeHanson www.instagram.com/okaytobesmart Merch store.dftba.com/collections/its-okay-to-be-smart Facebook www.facebook.com/itsokaytobesmartpbs/ Books from our episodes: smart-books.tumblr.com/

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