The term “acid rain” is often used to refer the precipitation of the acid component in the rain, snow, fog, dew, or dry particles. They are the result of air pollution. Many different chemicals are produced while burning any type of fuel.
The smoke that comes from fire or smoke emanating from car exhaust, contains not only the sooty gray particles that you can see but they also contain a lot of invisible gases. Some of these gases reacts with water droplets in clouds to form nitric and sulfuric acids. Rain from these clouds then falls as a very weak acid which is why it is known as “acid rain”.
Acid rain has a negative impact on forests, fresh water, and soil, killing insect and aquatic life forms and causing damage to the buildings and the possible impact on human health.