What are the major air pollution sources?
Record temperatures year-after-year. Our climate is changing so we have to better understand the air pollution sources causing it.
Look at each city of the world. Air pollution ranges from sparkling clean to nasty smog.
Why is this the case? It’s because of air pollution sources they are exposed to.
Whether it’s from agriculture, industry, vehicles, electricity or natural disasters, these are the major air pollution sources in the world.
1 AGRICULTURE generates methane
Agriculture is a major contributor to methane (80%) (CH4) and ammonia (90%) (NH3). But methane makes up about 9% of total emissions, whereas CO2 makes up about 82%.
Methane is a strong greenhouse gas and traps heat more efficiently than other gases. But it’s short-lived because it leaves the atmosphere within a decade after it’s released.
Bacteria in the guts of grass-eating animals such as cattle release methane as a by-product. Industry, landfills and natural gas systems also generate a significant amount of methane that adds to air pollution.
2 TRANSPORTATION burns gasoline releasing carbon dioxide
Gasoline is carbon bonded to itself or to hydrogen. When a vehicle consumes fuel, it burns these hydrocarbons to generate movement. In turn, it releases water vapor (H2O) and carbon dioxide (CO2) as air pollution.
As carbon dioxide enters the atmosphere, it traps heat inside contributing to the effects of greenhouse gas. Transportation accounts for 15%. But with the advances in electric vehicles and cleaner gasoline, is becoming increasingly difficult to account for.
3 ELECTRICITY GENERATION like coal generates sulfur oxides
Thermal power plants burning high-sulfur coal is a major contributor to greenhouse gas. Not only does it cause air pollution, but sulfur oxides are a risk to health and the environment.
Over time, there has been increasing efficiency in coal use. Overall, thermal power plants have been able to significantly reduce emissions of greenhouse gases and air pollutants.
4 INDUSTRY AND MANUFACTURING produce smog
As developing countries like China and India experience economic growth, they are in a phase of industrial revolution. This is why cities like Beijing have the highest rates of air pollution and smog in the whole world.
As industry and manufacturing grows, it demands more electricity to power them. Because China uses coal for thermo-electric power plants, higher electricity usage contributes to air pollution.
5 NATURAL SOURCES add to air pollution sources
Finally, there are natural phenomena that release air pollutants into the atmosphere. For example, volcanic eruptions release sulfur and carbon dioxide. Not only can volcano eruptions alter the chemical makeup in the atmosphere, but they are immediate hazardous risk to human health.
Dust storms also pose risk to health. For example, sandstorms irritate eyes, skin and the respiratory system. Dust storms can be caused by desertification.
This is often from overuse of the land, deforestation or over-grazing. These human activities expose soils and increase evaporation rates on the land.
Natural and anthropogenic emissions from the Earth:
- Methane (CH4)
- Carbon monoxide (CO)
- Carbon dioxide (CO2)
- Volatile organic compounds (VOCs)
- Sulfate (SO4)
- Nitrogen oxide (N2O)
- Chlorofluorocarbons (CFCs)
- Nitrate (NO3)