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How can sulfur dioxide pollution damage buildings and public monuments?
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Sulfur dioxide is a primary precursor to acid rain, which significantly damages human-made structures, particularly those constructed from marble and limestone.21
The damage occurs through two main processes:
- Chemical Reaction: Sulfur dioxide can react directly with limestone in the presence of water to form gypsum. This substance is structurally unstable, causing the surface of the material to flake off.2
- Direct Dissolution: Acid rain can dissolve marble and limestone through direct contact, leading to the gradual corrosion and deterioration of historic buildings, monuments, and gravestones.21
Protecting our cultural heritage and infrastructure from such chemical degradation is an essential environmental responsibility, as these materials are irreplaceable components of our history.21