The Norfolk Broads is an area of rivers and lakes in East Anglia. It is surrounded by farmland and has become a popular area for boating. During the course of this century the water has been polluted by the addition of sewage, animal wastes and fertilizers. This pollution has had a major effect on the ecology of the area. (a) Explain the part played by bacteria in converting organic matter in sewage to nitrate.

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Environmental Microbiology

Environmental biology deals with the study of microorganisms and their interaction with their surroundings. This term itself covers the microbial interactions with water, soil, air, and microbial too.