How is Acid Rain affecting the Colosseum at Rome?

Acid rain, which is caused by pollutants like sulfur dioxide and nitrogen oxides combining with water vapor in the atmosphere, can have a detrimental effect on historical structures like the Colosseum in Rome. The acid rain reacts with the limestone material of the Colosseum, leading to erosion and deterioration of the stone. Over time, this can weaken the structural integrity of the monument and contribute to its degradation. Conservation efforts, such as cleaning and protective coatings, are necessary to mitigate the impact of acid rain on the Colosseum and other historical landmarks.