Question

What are important sources of air pollution in India?

Answer 1

1. Vehicular emissions: Automobiles emit large amounts of carbon monoxide (CO), oxides of nitrogen (NOx), hydrocarbons, and particulate matter due to incomplete combustion of fuels.
2. Industrial emissions: Factories, especially thermal power plants, release sulfur dioxide (SO₂), fly ash, oxides of nitrogen, hydrocarbons, and particulate pollutants. Industries such as oil refineries, paper and pulp, fertilizer manufacturing, and smelting contribute significant amounts of sulfur compounds and toxic gases.
3. Burning of fossil fuels: Combustion of coal, petroleum, and natural gas in thermal power stations and other industrial setups emits large quantities of carbon dioxide (CO₂), sulfur dioxide, and particulate matter.
4. Domestic burning: Use of biomass like wood, cow dung, and coal for cooking and heating in rural and urban households results in the emission of smoke, carbon monoxide, and particulate matter.
5. Open burning of solid waste: Open burning of garbage and crop residues releases smoke, carbon monoxide, oxides of nitrogen, and other harmful gases.
6. Mining and metallurgical processes: Release of heavy metal particles including cadmium, lead, mercury, zinc, and copper into the air.
7. Natural sources: Volcanic eruptions and forest fires release particulate matter and gases but are less responsible compared to anthropogenic sources.