air pollution control
The process of attempting to limit the amount of air pollution
by regulating the emission of pollutants or their precursors.
Control strategies are alternative long-term policies that could reduce air pollution, as projected using air-quality modeling. For primary pollutants
such as sulfur dioxide
, control strategies include burning cleaner low-sulfur coal, scrubbing sulfur dioxide from the combustion products before releasing them into the atmosphere
, or changing to alternative fuels or processes. For secondary pollutants
such as ozone
that are not emitted directly but are created in the lower atmosphere
by a complex series of chemical and photochemical reactions involving [[NOx
]] and volatile hydrocarbons
, control is achieved by changing the emissions of one or both of the primary reactants.
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