Air pollution from cars, trucks and buses is split into primary and secondary pollution primary pollution is emitted directly into the atmosphere secondary pollution results from chemical reactions between pollutants in the atmosphere fetuses, newborn children, and people with chronic illnesses are especially susceptible to the effects of air pollutants. Pollution, also called environmental pollution, the addition of any substance (solid, liquid, or gas) or any form of energy (such as heat, sound, or radioactivity) to the environment at a rate faster than it can be dispersed, diluted, decomposed, recycled, or stored in some harmless form. Occur outside as well these changes are typically known as air pollution, of which there are two principal kinds, pollution that is released from a single, identifiable source, known as a point source and pollution that comes from a large number of dispersed sources, known as non-point or area sources of pollution.
An air pollutant is known as a substance in the air that can cause harm to humans and the environment pollutants can be in the form of solid particles, liquid droplets, or gases in addition, they may be natural or man-made pollutants can be classified as either primary or secondary.
Air pollution: current and future challenges however, air pollution can be harmful even when it is not visible newer scientific studies have shown that some pollutants can harm public health and welfare even at very low levels scientists warn that carbon pollution and resulting climate change are expected to lead to more intense.
Harmful chemical formed in the atmosphere when a primary air pollutant reacts with normal air components or other air pollutants smog urban air pollution composed of a mixture of smoke and fog produced from industrial pollutants and burning fuels there are several types of smog including photochemical smog and sulfurous smog.