Development of CFCs
Article Abstract:
Chlorofluorocarbons (CFCs) were discovered in the 1930s as effective nonflammable refrigerants which did not seem to pollute the immediate atmosphere. The low cost of CFCs encouraged their use as refrigerants. By the 1960s and 1970s, CFCs were being used as spray can propellants and in the manufacture of foam products. In the 1980s, their effectivity as cleaning solvents was discovered. Meanwhile, other chemicals which contribute to the depletion of the ozone layer such as methyl chloroform, carbon tetrachloride and halons were being discovered and used extensively by industries.
Publication Name: CQ Researcher
Subject: News, opinion and commentary
ISSN: 1056-2036
Year: 1992
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1998: a "mean" season for Atlantic hurricanes
Article Abstract:
National Oceanic and Atmosphere Administration (NOAA) scientists say that the 1998 Atlantic hurricane season was the worst in over 200 years with the number of hurricanes and tropical storms rising by 50% and 30%, respectively. The weather is attributed to the La Nina climate phenomenon characterized by a drop in sea surface temperatures in the central tropical Pacific. The NOAA also conducted the most comprehensive observations of hurricanes in 1998.
Publication Name: Bulletin of the American Meteorological Society
Subject: Earth sciences
ISSN: 0003-0007
Year: 1999
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California dreamin'
Article Abstract:
A swimming bleacher bum daydreamed about being given the opportunity to train under Olympic coach Mark Schubert for one day. Arriving at the University of Southern California, the 40-year-old daydreaming bum doubted whether he would be able to meet Schubert's 3,000-yard workout. Although he encountered difficulties during the first two hundred yards, the daydreamer eventually worked up enough strength to meet the Schubert challenge.
Publication Name: Rodale's Fitness Swimmer
Subject: Sports and fitness
ISSN: 1083-6357
Year: 1998
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