This book is specifically compiled according to the syllabus for B.Pharma students. The book embodies a number of self-explanatory figures as well as tables with latest data and information. This book shall be of utmost interest to B.Pharma and other undergraduate and post- graduate course of various universities. Besides educational institutions the work will have a direct appeal for NGOs, CBOs, Policy Makers, Ministries and other Government Libraries where knowledge of Environment & Ecology is of paramount importance