Nuclear power has a controversial history, but many energy experts say it has a major role to play in our energy future. Some in the industry are working to make standard fission power safer and cheaper. Others are pursuing the holy grail of energy - nuclear fusion, the process that powers the sun and the stars. If we figure out how to harness that power here on earth, it would be a huge game-changer.» Subscribe to CNBC: https://cnb.cx/SubscribeCNBC» Subscribe to CNBC TV: https://cnb.cx/SubscribeCNBCtelevision» Subscribe to CNBC Classic: https://cnb.cx/SubscribeCNBCclassicAbout 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 OnlineGet the latest news: https://www.cnbc.com/Follow CNBC on LinkedIn: https://cnb.cx/LinkedInCNBCFollow CNBC News on Facebook: https://cnb.cx/LikeCNBCFollow CNBC News on Twitter: https://cnb.cx/FollowCNBCFollow CNBC News on Instagram: https://cnb.cx/InstagramCNBC#CNBCIs Nuclear Fusion The Answer To Clean Energy?