There are many benefits to using renewable energy resources, but what is it exactly? From solar to wind, find out more about alternative energy, the fastest-growing source of energy in the world—and how we can use it to combat climate change. ➡ Subscribe: bit.ly/NatGeoSubscribe About National Geographic: National Geographic is the world's premium destination for science, exploration, and adventure. Through their world-class scientists, photographers, journalists, and filmmakers, Nat Geo gets you closer to the stories that matter and past the edge of what's possible. Get More National Geographic: Official Site: bit.ly/NatGeoOfficialSite Facebook: bit.ly/FBNatGeo Twitter: bit.ly/NatGeoTwitter Instagram: bit.ly/NatGeoInsta Select footage courtesy NASA svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11056 Read more in "Renewable energy, explained" on.natgeo.com/2I5gp3L Renewable Energy 101 | National Geographic youtu.be/1kUE0BZtTRc National Geographic www.youtube.com/natgeo