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Global Climate Change Digest

A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999



Item #d95aug59

"Summer UV Protection—What's a Sun Lover to Do?" Global Environ. Change Rep., 1-2, May 26, 1995.

Applying the same definition as that used for sunscreen formulations, gives the following Sun Protection Factor (SPF) ratings for various white fabrics: 34 for polyester; 12 for cotton twill; 8 for wool; 4-5 for nylon; and 3-4 for cotton. Preliminary research shows that colored fabrics provide considerably more protection than white ones. New sunscreen products containing protective agents derived from yeast are being developed.

Item #d95aug60

"Search for Halon Replacements Stymied by Complexities of Fires," M. Freemantle, Chem. Eng. News, 25-31, Jan. 30, 1995.

European scientists, in a two-year project (SUBSTHAL), have not found a suitable replacement for CBrF3, one of the two most widely used halons. The project focussed on fully fluorinated compounds, and hydrofluorinated hydrocarbons and partially chlorinated and brominated substances—physical-action agents that work through heat capacity.

Item #d95aug61

"Holes in Ozone Science: Researchers Look at Loss of the Protective Layer Above Our Heads," S. Nemecek, Scientific American, 26-27, Jan. 1995.

Data from NASA's Stratospheric Photochemistry, Aerosols and Dynamics Expedition Project show that there is a region where nitrogen oxides from the exhaust of supersonic aircraft might not be detrimental. The top of the path is an altitude of 20 kilometers.

Item #d95aug62

"The Military's Role in Protection of the Ozone Layer," S.O. Andersen, E.T. Morehouse Jr., A. Miller, Environ. Sci. Technol., 586A-589A, Dec. 1994.

In 1990 the signatories to the Montreal Protocol agreed to a 100% phaseout of CFCs. Instead of seeking an exemption, the U.S. military worked with those of other nations through NATO to address the issue of ozone depleting substances, and leads the world in developing and implementing alternatives.

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