Oftentimes when we talk about air pollution people tend to have limited options but there's more to that.The leading global pollutants  are the mobile sources that we see as luxurious but they pose more harm than good in our ecosystem. 

mobile sources – such as cars, buses, planes, trucks, and trains

stationary sources – such as power plants, oil refineries, industrial facilities, and factories

area sources – such as agricultural areas, cities, and wood burning fireplaces

natural sources – such as wind-blown dust, wildfires, and volcanoes

Graphic of Air pollution pathways: mobile, stationary, area, and natural.

Mobile, stationary, area, and natural sources all emit pollution into the air.

Mobile sources account for more than half of all the air pollution in the world  due to the movements that people make everywhrere .

The primary mobile source of air pollution is the automobile, according to the Environmental Protection Agency. Sources, like power plants, emit large amounts of pollution from a single location, these are also known as point sources of pollution. Natural sources can sometimes be significant but do not usually create ongoing air pollution problems like the other source types can.Air pollution has been in existence for quite a long time due to the human activities not regarding how the ecosystem is hurting.

Pollution from human-generated and natural sources is often created in one place and transported through the air. Sometimes chemical reactions in the atmosphere change pollutants before they are deposited. Pollutants in the air can create haze, making it harder to see, and pollutant deposition can have environmental effects to the ecosystem and even to the human race too

Wind can move air pollutants short or very long distances before they cause harmful impacts.Air pollution caused by mobile source,stationary sources,area sources and natural sources can be controlled once the human race understand the negative impacts of air pollution. It calls for  action against air pollution in our ecosystem.

REFERENCE 

Climate Change Organisation 

Air Redsources Division

https://www.nps.gov/