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Shankar IAS Enviornment Notes 6th Edition Revised
It is the only complete set of Enviornment notes. Quality of print is excellent. Enviornment by shankar IAS most popular amoung UPSC aspirants.
The book consist of ~400 pages. It covers the entire enviornment and ecology in most exhaustive among all other material in the same category.
* Black and white material - Photocopy