What is air pollution? Learn how greenhouse gasses, smog, and toxic pollutants effect climate change, and human health. ➡ Subscribe: http://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: http://bit.ly/NatGeoOfficialSite Facebook: http://bit.ly/FBNatGeo Twitter: http://bit.ly/NatGeoTwitter Instagram: http://bit.ly/NatGeoInsta Read more in "Air pollution, explained" https://on.natgeo.com/2uIJIBg Air Pollution 101 | National Geographic https://www.youtube.com/watch?v=e6rglsLy1Ys National Geographic null