Acid rain is a type of precipitation that has a higher acidity than normal rainwater. This occurs when sulfur dioxide (SO2) and nitrogen oxides (NOx) are released into the atmosphere, often from burning fossil fuels. These gases react with water vapor, oxygen, and other chemicals in the air, forming sulfuric and nitric acids. When it rains, these acids fall to the ground, leading to harmful effects on the environment. The impact of acid rain can be significant. It can damage forests, harm aquatic ecosystems in lakes and rivers, and erode buildings and monuments made of limestone and marble. Additionally, acid rain can affect soil quality, making it harder for plants to absorb essential nutrients.