Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > SULFUR COMPOUNDS > SULFUR DIOXIDE

Definition:
Sulfur dioxide (SO2) is a non-inflammable colorless gas. SO2 is
usually oxidized by ozone and hydrogen peroxide to form sulfur trioxide, a
secondary pollutant that is extremely soluble in water. Droplets of
sulfuric acid (acid rain) are formed when sulfur oxides are present in
the atmosphere. The production of SO2 originating from coal-fired power
plants and other fossil fuel combustion is largely responsible for
the damage caused by acid rain. Volcanic eruptions also provide a source
of sulfur dioxide in the atmosphere but are insignificant when compared
to anthropogenic sources. [Science; v265; 497-9; 1994.] [Nature;
v366;327-9; 1993.]


Reference:
Atmospheric and Air Chemistry Glossary from the Sam Houston State University.
http://www.shsu.edu/~chemistry/Glossary/glos.html