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Unformatted text preview: Env Science Lecture 22:02 Carbon credits, carbon trading- entities that emit carbon are responsible for offsetting that carbon (carbon sequestration) Variability of Air Pollution : • Problems vary in different regions of the country and world o L.A. pollution vs. Great Lakes • Also varies with time of year o Smog- high heat and sunshine in summer o Particulates- dry months Particulates: Las Vegas • Little vegetation, wind can transport of find dust • Brown haze over Las Vegas partly due to naturally occurring PM 10 • 60% of dust: construction sites, dirt roads, vacant land Haze from Afar : • Air quality concerns are not restricted to urban areas!! Urban Air Pollution: • Air pollution development depends on topography and meteorological conditions o Rate of transport and conversion to harmless compounds Potential for Urban Air Pollution : • The rate of emission of pollutants per unit area: example: the density of automobiles • The downwind distance thru and urban area • Wind speed •...
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- Spring '07
- urban air pollution