Check out the heroes who saved the ozone layer at https://futureoflife.org/future-of-life-award/ Lots of global problems seem intractable, but there’s a formula for success that we can follow. LEARN MORE ************** To learn more about this topic, start your googling with these keywords: Ozone layer: A thin layer of ozone concentrated in the Earth’s stratosphere roughly 10 kilometers above that absorbs most of the sun’s ultraviolet radiation before it hits the Earth’s surface. Ultraviolet radiation: Invisible rays of energy that come from the sun that can be harmful to humans and other lifeforms. Chlorofluorocarbons: Also known as CFCs, these long man-made molecules used to be widely used refrigerants and solvents before it was discovered that - when exposed to ultraviolet radiation - their chlorine atoms would break off and combine with ozone molecules. Smallpox: A virus that killed more than half a billion humans before being eradicated in 1980. Disease Surveillance: A practice by which disease progressions are closely monitored in order to minimize the harm caused by outbreaks. ⬇️ PREORDER OUR FIRST BOOK (out October 12th) ⬇️ DFTBA (get SUPER-cool book bundles here!): null Amazon - http://bit.ly/MinuteEarthExplains Bookshop.org - http://bit.ly/MinuteEarthexplains Barnes and Noble - http://bit.ly/Minuteearthexplains Indigo (Canada)- http://bit.ly/MinuteearthExplains SUPPORT MINUTEEARTH ************************** If you like what we do, you can help us!: - Become our patron: https://patreon.com/MinuteEarth - Share this video with your friends and family - Leave us a comment (we read them!) CREDITS ********* David Goldenberg (@dgoldenberg) | Script Writer, Narrator and Director Ever Salazar (@eversalazar) | Illustration, Video Editing and Animation Nathaniel Schroeder | Music MinuteEarth is produced by Neptune Studios LLC https://neptunestudios.info/ OUR STAFF ************ Sarah Berman • Arcadi Garcia i Rius David Goldenberg • Julián Gustavo Gómez Melissa Hayes • Alex Reich • Henry Reich • Peter Reich Ever Salazar • Leonardo Souza • Kate Yoshida OUR LINKS ************ Youtube | null TikTok | https://tiktok.com/@minuteearth Twitter | https://twitter.com/MinuteEarth Instagram | https://instagram.com/minute_earth Facebook | https://facebook.com/Minuteearth Website | https://minuteearth.com/ Apple Podcasts| https://podcasts.apple.com/us/podcast/minuteearth/id649211176 REFERENCES ************** Ochmann, Sophie, and Max Roser. “Smallpox.” Our World in Data, 2018, https://ourworldindata.org/smallpox. Data on Smallpox. Henderson, D A. SMALLPOX - the DEATH of a DISEASE : The inside Story of Eradicating a Worldwide Killer. S.L., Prometheus, 2021, pp. 57–61. CDC. “History of Smallpox.” Centers for Disease Control and Prevention, 20 Feb. 2021, https://cdc.gov/smallpox/history/history.html. Waxman, Olivia B. 2019. “Reagan Administration Officials at First Dismissed the Ozone Hole. Here’s What Changed.” Time. April 9, 2019. https://time.com/5564651/reagan-ozone-hole/ Velders, G. J. M., S. O. Andersen, J. S. Daniel, D. W. Fahey, and M. McFarland. 2007. “The Importance of the Montreal Protocol in Protecting Climate.” Proceedings of the National Academy of Sciences 104 (12): 4814–19. https://doi.org/10.1073/pnas.0610328104. US Department of Commerce, National Oceanic and Atmospheric Administration. n.d. “Susan Solomon: Pioneering Atmospheric Scientist.” Celebrating200years.noaa.gov. Accessed July 20, 2021. https://celebrating200years.noaa.gov/historymakers/solomon/welcome.html. Solomon, Susan. 2019. “The Discovery of the Antarctic Ozone Hole.” Nature 575 (7781): 46–47. https://doi.org/10.1038/d41586-019-02837-5 Pyle, John, and Neil Harris. 2013. “Joe Farman (1930–2013).” Nature 498 (7455): 435–35. https://doi.org/10.1038/498435a. Foege, William H, and Milbank Memorial Fund. House on Fire : The Fight to Eradicate Smallpox. Berkeley, University Of California Press, 2012 Future of Life Institute. “Future of Life Award 2020: Saving 200,000,000 Lives by Eradicating Smallpox.” Future of Life Institute, Lucas Perry, 11 Dec. 2020, https://futureoflife.org/the-future-of-life-podcast/.