Pollution is the introduction of contaminants into a natural environment that causes instability, disorder, harm or discomfort to the ecosystem i.e. physical systems or living organisms. 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 non-point source pollution. The Blacksmith Institute issues an annual list of the world’s worst polluted places. Pollution became a popular issue after World War II, due to radio-active fallout from atomic warfare and testing.
ABOUT THE AUTHOR M P Singh
Dr. M.P. Singh, Head of the Department of Forest Sciences, Birsa Agricultural University, Ranchi (Jharkhand) earned his mater's degree in Botany with specialization in Taxonomy and after his PH.D degree in Floristic from Patna University and Diploma in Forestry from Forest Research Institute, Indian Council of Forestry Research & Education, Dehradun. He is a fellow in Life Sciences of Mendelian Society of India, Patna. Besides teaching Dr. Singh has been engaged with independent research in Project of Government of India as Principal investigator. He is noted Taxonomist of the country and have about twenty one years of long experiences. He is an advisor to the Government of India for whole Eastern Region on Horistic research and member of FLORA INDIA. He is the Editor of Journal "New Botanist" for forestry sector. He has published eight books in Botany, Forestry and on Environmental Sciences and also published eighty five research papers in National/International Journals. He has also guided a number of Scholar for award of Ph. D. degree in Botany as well as in Forestry. He is one of the member of Botanical Survey of India in a Research Selection Committee. He has extensively travelled in India and abroad in conection to floristic studies.
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