Even though it basically sounds like a buzzword at this point, acid rain is a very serious matter. It refers to rain, snow, fog, dust, or hail that contains acidic components, such as sulfur or nitric acid. It’s caused by sulfur oxide and nitrogen oxide being emitted into the atmosphere, traveling with wind and air currents, and reacting with water and air to fall back to earth. While some comes from volcanoes, most come from burning fossil fuels like oil, coal, petroleum, and natural gas.
