Carbon dioxide acts like a heat-trapping blanket, warming our planet in a phenomenon known as the greenhouse effect. Play NOVA's Polar Lab to find out what too much CO2 in our atmosphere may mean for our planet: https://www.pbs.org/wgbh/nova/labs/lab/polar/ Production Credits: Hosted by: Caitlin Saks Production by: Ari Daniel & Lorena Lyon Camera: Emily Zendt NOVA Labs Editorial Director: David Condon Additional Visuals: Mitch Butler, NASA's Goddard Space Flight Center, Shutterstock, Videoblocks Music: APM © 2020 WGBH Educational Foundation