Acid rain eats into such materials, and, through a series of chemical reactions, turns the hard calcium carbonate on their surfaces into powdery white calcium sulfate (gypsum), which then cracks and flakes off.
當酸雨降落時，會向內侵蝕這些石材，並經過一連串的化學反應，將表層堅硬的碳酸鈣，轉化為白色粉塵的硫酸鈣（石膏原料），最後脆裂剝落。