Dr. Paul Newman is the chief scientist for atmospheric sciences at NASA Goddard. In this talk he discusses how chlorofluorocarbons were destroying the ozone layer, what policy-makers did about it, and what challenges the ozone layer faces today.
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.
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 18.104.22.168.0