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ACID RAIN (SO2) DAMAGE: LIMESTONE GARGOYLES<br />
Notre Dame, Paris, France 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.

Fphoto-18139110A-2DS.jpg

ACID RAIN (SO2) DAMAGE: LIMESTONE GARGOYLES
Notre Dame, Paris, France 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:© 1991 Diane Hirsch - Fundamental Photographs

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Diane Hirsch