We're hearing tons of stuff about climate change these days, from doomsday to total hoax. This week, Corey and Mel look at how climate change is talked about on all sides, and discuss important topics we don't often hear about: CO2 sinks, domino effects, and challenges with emerging "green" technologies. The episode includes the story of Biosphere II, a huge survival shelter experiment in 1990's Arizona that had a surprising outcome.