The theme of this course is how humans impact the environment with our developing technologies. The course examines how aquatic ecosystems are altered by the activities of agriculture, forestry, aquaculture, solid waste disposal, our demands for industry, e.g., pulp and paper, manufacturing, and mining, and our basic needs for clean drinking water, e.g., water and sewage treatment. The course appraises evolving, alternative technologies, with visits to some of these operations to learn how new technologies are reducing impacts and protecting water resources for the future.