Pollution control and management in environment:
Pollution is the introduction of contaminants into the natural environment that causes adverse change. They can take the form of chemical substances or energy, such as noise, heat or light. The components of pollution, can be either foreign substances/energies or naturally occurring contaminants. It is often classed as point source or nonpoint source pollution. The pollutions are always accompanied civilization. It is started from prehistoric times when man was created fire. The burning of coal and wood in presence of many horses in concentrated areas.