This document discusses acid rain, its causes and effects. Acid rain is rain that has been acidified by sulfur and nitrogen oxides emitted by power plants, factories and vehicles. It can damage buildings and structures made of limestone and marble by corroding and cracking the material, as seen with the Taj Mahal. Statues are also at risk, such as the Statue of Liberty. The best ways to reduce acid rain are using cleaner fuels, improving coal burning efficiency and reducing vehicle and energy usage.