Environmental Pollution Control Technologies, Bioremediation, Ecological Conservation, Biodiversity & Resource Management. 30 years at U.G. & P.G. in BHU, conducted a number of training programmes and U.G.C. refresher courses. Published 162 research papers including 9 books.in the reputed national & international journals i.e. British medical journal, Air Water and Soil Pollution, Chemosphere, AMBIO, Atmospheric Environment, of England, USA, Belgium, Switzerland, Great Britain, The Netherlands and India. Projects: 10, Ph. D: 21.