In 2009, climate scientist Richard Alley (Pennsylvania State University) held the talk, “The Biggest Control Knob: Carbon Dioxide in Earth’s Climate History” (Bjerknes Lecture), at the American Geophysical Union Fall Meeting. CO2 is, and has always been, the biggest climate control knob in the Earth’s history https://mind.ofdan.ca/co2-is-and-has-always-been-the-biggest-climate-control-knob-in-the-earths-history 2015 release by AGU https://youtu.be/3UVb–2-PBg
This groundbreaking NRDC documentary explores the startling phenomenon of ocean acidification, which may soon challenge marine life on a scale not seen for tens of millions of years. The film, featuring Sigourney Weaver, originally aired on Discovery Planet Green.
National Geographic Extreme Ice: In the extreme, ice-bound regions of the earth, something unprecedented is happening. Everywhere, glaciers and ice sheets have begun breaking apart, and accelerating towards the oceans at alarming speeds. http://www.imdb.com/title/tt1393566 Related World’s Changing Glaciers “Chasing Ice” (2012)