The correct answer is: A. Coal
Coal is the major source of energy in India, accounting for about 70% of the country’s electricity generation. Coal combustion is a major source of air pollution, including particulate matter, sulfur dioxide, and nitrogen oxides. These pollutants can cause respiratory problems, heart disease, and cancer.
Firewood is the second-largest source of energy in India, accounting for about 15% of the country’s energy consumption. Firewood burning is also a major source of air pollution, but it is not as significant as coal combustion.
Refuse burning is a minor source of air pollution in India, accounting for about 1% of the country’s emissions. Refuse burning is primarily a problem in urban areas, where there is a large amount of waste to be disposed of.
Vegetable waste product is not a significant source of air pollution in India. Vegetable waste is typically composted or used as animal feed, and it is not burned in large quantities.
In conclusion, coal is the major source of air pollution in India. Coal combustion is a major source of particulate matter, sulfur dioxide, and nitrogen oxides. These pollutants can cause respiratory problems, heart disease, and cancer.