The retrieval of accurate vertical column amounts of stratospheric constituents from zenith-sky spectroscopy is dependent on accurately modeling the transfer of radiation through the atmosphere and calculating suitable air mass factors (AMFs).
Analyzes the effects of an innovative and controversial program — voluntary accelerated vehicle retirement — that is part of California's plan for complying with federal clean-air standards by the required date of 2010.
Argues that developing and industrialized countries can avoid both environmental and economic disaster resulting from global warming by harnessing alternative fuel technologies; also covers relations with China and U.S. military personnel issues.
Provides information about proposals to exempt small firms and small-volume contributors, including the number and proportion of business firms that would be released, the proposals' dollar costs, and their effect on firms that would remain liable.
Particulate matter (PM) comes from a variety of sources and is a mixture of many pollutants made up of several different chemical species. Monitoring to determine whether an area has met EPA standards requires a comprehensive approach.