Question

what are the harmful substance present in the air

Answer 1

Toxic, or hazardous, air pollutants cause or are suspected of causing cancer, birth defects, or other serious harms. They can be gases, like hydrogen chloride, benzene or toluene, dioxin, or compounds like asbestos, or elements such as cadmium, mercury, and chromium.

Answer 2

Answer:

Carbon Monoxide. Carbon monoxide is a very toxic pollutant that forms when there is a lack of oxygen to make carbon dioxide.