Polar bears' biggest extinction threats stem from climate change, as these animals live on sea ice and thrive in cold temperatures. Sea ice is currently declining due to climate warming, caused by a buildup of too many fossil fuel emissions trapped in the atmosphere, acting like a heat-trapping blanket. By practicing environmental sustainability through activities like reducing CO2 emissions, switching to renewable energies like solar and wind power, and talking to friends and family about the importance of protecting our resources for the future, we can all play a part in stopping polar bears from becoming extinct. Learn more about how you can get involved by visiting Take Action on Polar Bears International’s website.