Episode 12 of Fox's Cosmos focuses on the scientific rationale for climate change. The greenhouse effect, which was one of the main scientific endeavors of the original Cosmos host Carl Sagan, is when gas in the atmosphere traps sunlight bouncing off of the Earth's surface. Modern civilization burns fossil fuels which adds more carbon to the air, helping the atmosphere get even warmer. Check out this video below for a visual explanation of the greenhouse effect.

Look below for more video blurbs from Cosmos, as well as the live Storify twitter chat that we held during the show's viewing.