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ACID RAIN DAMAGE TO STATUE OF WASHINGTON - AFTER<br />
(2 of 2)<br />
Washington as President - Washington Square Arch, July 17 1935. SO2 (sulfuric dioxide) combines with atmospheric moisture (H20), yielding acid rain, or sulfuric acid (H2SO4).  Calcium carbonate in limestone statuary dilutes the sulfuric acid to form calcium sulfate, corroding the stone.

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ACID RAIN DAMAGE TO STATUE OF WASHINGTON - AFTER
(2 of 2)
Washington as President - Washington Square Arch, July 17 1935. SO2 (sulfuric dioxide) combines with atmospheric moisture (H20), yielding acid rain, or sulfuric acid (H2SO4). Calcium carbonate in limestone statuary dilutes the sulfuric acid to form calcium sulfate, corroding the stone.

Copyright:© 1994 Kristen Brochmann - Fundamental Photographs

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Kristen Brochmann