Sulfur Dioxide

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. It is a toxic gas with a pungent, irritating smell, that is released by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide unless the sulfur compounds are removed before burning the fuel. Further oxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain. Sulfur dioxide emissions are also a precursor to particulates in the atmosphere. Both of these impacts are cause for concern over the environmental impact of these fuels.

Read more about Sulfur DioxideStructure and Bonding, As An Air Pollutant

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Sulfur Dioxide - Safety - Ingestion
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Acid Rain Retirement Fund - Accomplishments To Date
... and in 2011 owns the right to emit 211 tons of sulfur dioxide per year, plus whatever amount it has not emitted in previous years ... in 2011 holds the legal right to emit a total of 1,120 tons (2,240,000 pounds) of sulfur dioxide in 2011 ... for purposes other than releasing air pollution own the right to emit 1,321 tons per year of sulfur dioxide ...
Sulfinic Acid
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Air Pollution Index - Hong Kong
... The API is based on the level of 6 atmospheric pollutants, namely sulfur dioxide (SO2), nitrogen dioxide (NO2), respirable suspended particulates, carbon monoxide (CO), ozone (O3), lead (Pb), measured ... There are hourly, 24 hour and annual targets for sulfur dioxide and nitrogen dioxide, and 24 hour and annual targets for particulates ... The World Health Organisation revised its air quality guideline levels of sulfur dioxide, nitrogen dioxide and ozone in 2006 in light of new scientific evidence ...
La Oroya - Pollution
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