Overview of the global environmental problems: Climate change, Energy crisis, use and abuse of plastics. Renewable and Non - renewable resources of energy. Biofuels: Scope, source and production process. Bioremediation: Bioremediation of soil & water contaminated with oil spills, heavy metals and detergents. Treatment of municipal and Industrial waste water. Biofertilizers and Biopesticides - Scope, production and uses.