Pollution can be defined as an undesirable change in the physical, chemical, or biological characteristics of the air, water, or land that can harmfully affect health, survival, or activities of humans or other living organisms. Not only that according to this definition pollution does not have to cause physical harm. Environmental pollution in its present state is classified in this book.
Encyclopaedia of Environmental Pollution and Awareness in 21st Century (Vol. 1-10.)
Unnecessary and unwise ...
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