What is meant by environmental pollution?

(N/A) Environmental pollution is the effect of undesirable changes in our surroundings that have harmful effects on plants,animals,and human beings.
$A$ substance that causes pollution is known as a pollutant. Pollutants can be solid,liquid,or gaseous substances present in concentrations greater than their natural abundance and are produced due to human activities or natural events.
Some pollutants are degradable,such as discarded vegetables. However,some pollutants are slowly degradable and remain in the environment in an unchanged form for many decades. Examples include plastic materials,heavy metals,nuclear wastes,$DDT$,and many other chemicals. These substances are difficult to remove once released into the environment as they cannot be degraded by natural processes,making them harmful to living organisms. In the process of environmental pollution,pollutants originate from a source and are transported by air or water or are dumped into the soil by human beings.