Hydropower is the world’s largest source of renewable energy, yet we don’t hear much about it. That’s in part because hydropower generation in the U.S. has remained relatively steady for decades. But internationally, it’s been growing rapidly, especially in China. That growth has some environmentalists concerned, as dams and reservoirs disrupt the surrounding ecosystems and can create C02 and methane emissions. Plus, hydropower generation is threatened as climate-driven droughts become increasingly common. Yet many experts say that hydropower is absolutely vital for a fossil fuel-free world and so learning how to mitigate these challenges will be critical in the decades to come. » 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 What Is The Future Of Hydropower?