According to acid deposition what is an emission? List the three major types of

Acid deposition is when acidic or acid-forming pollutants in the atmosphere deposit on the surface of Earth, and this can occur from any precipitation (such as rain, snow or sleet), but also from fog, gases and dry particles.

One of the major sources of pollutants is the burning of fossil fuels from car emissions and energy producing plants. The types of pollutants that cause acid deposition are primary pollutants because once in the atmosphere, they react to form harmful substances. The substances that are formed from primary pollutants are called secondary pollutants.

When you think of air pollution, you likely think of human activities, such as coal-burning plants and emissions from cars, planes and boats. But, air pollution also comes from natural sources. Volcanoes are a great example of a natural pollution source; they produce large amounts of particles and gases, and the eruptions send them up into the atmosphere. Forest fires are a natural process that also produce large amounts of potentially harmful gas and particulate matter.

No matter the source, there are two ways pollution can enter the air. Point source pollution is when the air pollutants come from a single source of origin, such as smokestacks at a single factory. Non-point source pollution is when the air pollutants come from many sources, such as all of the cars in the U.S.

Just like not all sources of pollution are the same, pollutants also vary in their effects. Primary pollutants are those that cause direct harm or that can react to form harmful substances in the atmosphere. Secondary pollutants are those harmful substances that are created from the reactions between primary pollutants and the components of the atmosphere.