Summer 2021 is shaping up to be one of the hottest in history, as the effects of climate change are becoming ever clearer. Naturally, that’s led to an increase in global demand for air conditioning, which itself is a major contributor to global warming. It’s a vicious cycle, but there are a number of companies working to make heating and cooling more energy efficient, and get buildings off of fossil fuels for good. » Subscribe to CNBC: https://cnb.cx/SubscribeCNBC » Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision » Subscribe to CNBC Classic: https://cnb.cx/SubscribeCNBCclassic About CNBC: From 'Wall Street' to 'Main Street' to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more. Connect with CNBC News Online Get the latest news: https://www.cnbc.com/ Follow CNBC on LinkedIn: https://cnb.cx/LinkedInCNBC Follow CNBC News on Facebook: https://cnb.cx/LikeCNBC Follow CNBC News on Twitter: https://cnb.cx/FollowCNBC Follow CNBC News on Instagram: https://cnb.cx/InstagramCNBC #CNBC How Air Conditioning Is Warming The World