Word: carbons
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Dates: during 1970-1979
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...found that air quality in the Harvard Square area presently exceeds federal standards for carbon monoxide concentrations 60 to 70 per cent of the time...
...objective of the impact analysis was to evaluate the maximum carbon monoxide levels which could arise as a consequence of both adverse meteorological conditions and peak roadway traffic. Although motor vehicles are also major contributors to community nitrogen oxides and reactive hydrocarbon emissions, these species participate in a series of complex photochemical reactions for which the current atmospheric diffusion modeling technology does not permit preparation of reliable estimates of projected concentration levels. Therefore, emphasis was placed principally on carbon monoxide concentration levels as this pollutant is relatively inert. In addition, carbon monoxide is the pollutant emitted in the largest quantities...
...cases, predicted carbon monoxide levels will be within air quality standards established by the State and Federal Authorities. The small incremental increase in traffic induced by the project will have an insignificant effect on the attainment and maintenance of such standards. Thus, the project is consistent with the State Implementation Plan developed to insure the attainment of air quality standards required under the Federal Clean...
Concern arose last year when the Environmental Protection Agency's Cincinnati laboratory found that the levels of some hazardous chemicals in polluted water-most notably carbon tetrachloride and chloroform-increased when passed through municipal water-treatment plants...
...bottled water, and city officials announced that they would investigate the water supply further.) Actually, the link between chlorination and the formation of these chemicals was confirmed abroad. J.J. Rook, a Dutch scientist, added chlorine to contaminated river water and to relatively pure lake water. The concentration of carbon tetrachloride and chloroform rose sharply in the polluted water, but not in the sample from the lake...