Examines environmental and applied aspects of microbiology. Interactions of microbes with plants, with animals and with each other are discussed. Microbes in air, water and soil habitats and their roles in biogeochemical cycling are presented. Effects of pollutants, uses of microorganisms in bioremediation, in mineral recovery and the control of pests are reviewed. Laboratory experiments include techniques in sampling, counting and monitoring microbes in the environment. This course is an elective for Biology majors. Prerequisite: BIOLOGY 242 (Microbiology). Four hours of lecture/laboratory per week. Laboratory hours may vary. Not offered every semester.