Earth  ID: 11813

A Story of Ozone: The Earth's Natural Sunscreen

In this talk, Dr. Paul Newman tells the story of how scientists and policy-makers safeguarded the Earth’s ozone layer and the world we avoided by regulating chlorofluorocarbons (CFCS) . Back in the 60s, we used chlorofluorocarbons, a chlorine-containing chemical, in everything from hairsprays and deodorants to foam products and air conditioners. But in 1974, chemists Sherwood Rowland and Mario Molina published a paper claiming CFCs were destroying the ozone layer. The Molina-Rowland paper launched a debate in the scientific community that ultimately led to the halls of the United Nations. Today, more than 191 countries have signed the Montreal Protocol— a treaty that regulates the use of chlorofluorocarbons—and the ozone layer is on the mend. But the story has taken a new and unpredictable turn as the class of compounds that replaced CFCs act as greenhouse gases.

Credits

Alison Schuyler Ogden (NASA/GSFC): Lead Producer
Alison Schuyler Ogden (NASA/GSFC): Lead Editor
Rob Andreoli (AIMM): Videographer
John Caldwell (AIMM): Videographer
Stuart A. Snodgrass (HTSI): Technical Support
Rich Melnick (HTSI): Technical Support
Paul Newman (NASA/GSFC): Project Scientist
Please give credit for this item to: Alison Ogden
NASA's Goddard Space Flight Center

Short URL to share this page:
http://svs.gsfc.nasa.gov/11813

Mission:
Aura

This item is part of this series:
Narrated Movies

Goddard TV Tape:
G2015-023 -- Ozone with Paul Newman

Keywords:
SVS >> HDTV
GCMD >> Earth Science >> Atmosphere
GCMD >> Earth Science >> Atmosphere >> Atmospheric Chemistry/Oxygen Compounds >> Ozone
SVS >> Aura
NASA Science >> Earth

GCMD keywords can be found on the Internet with the following citation: Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0