February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 8, NUMBER 8, AUGUST 1995
"Summer UV ProtectionWhat'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.
"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 substancesphysical-action
agents that work through heat capacity.
"Holes in Ozone Science: Researchers Look at Loss of the Protective
Layer Above Our Heads," S. Nemecek, Scientific American, 26-27,
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.
"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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