How Acid Rain is Formed
Acid rain forms in the upper atmosphere by combining water vapor with industrial gases, such as sulfur dioxide and nitrogen oxide. The gases that cause water vapor to become acidic come mainly from the emissions of manufacturing companies and car exhaust. For rain to be considered acidic, it must have a Ph of 3.6 or lower.
Acid rain can fall in two forms: wet deposition and dry deposition. Wet deposition is acidic rain, snow, or fog; dry deposition is an acidic gas. acid rain has multiple negative effects and one known positive effect. The one known positive effect is that the sulfur dioxide that causes acid rain actually helps slow down the process of global warming. Some of the negative effects of acid rain is that acid rain harms plants, animals, and buildings. Some of the buildings that have already been affected by acid rain are the Taj Mahel in India, the Parthenon in Greece, and the Lincoln Memorial in the United States.