Question

An undesirable change in the physical or chemical or biological
characteristics of air is called "Air pollution." What are the substances
known as which contaminate air? Name the agents which lead to air
pollution and explain any one of them.​

Answer 1

Answer:

pollution

Any undesirable change in physical, chemical or biological characteristic of air, land, water or soil is called pollution.

Answer 2

Answer:

pollutant is that substance which contaminate air.

There are different types of air pollutants, such as gases (such as ammonia, carbon monoxide, sulfur dioxide, nitrous oxides, methane and chlorofluorocarbons), particulates (both organic and inorganic), and biological molecules.