Question

what is pollution how many types of pollution

Answer 1

The mixture unexpected things in pure things is called pollution
Pollution are three types
(1)Land pollution
(2)Water pollution
(3)Air pollution

Answer 2

Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or
nonpoint source pollution.

Types of pollution are

Air pollution
Land pollution
Water pollution