Assume that you are a regulator charged with drawing up plans for controlling water pollution, and briefly describe your strategy for controlling water pollution from each of the following sources:...

Assume that you are a regulator charged with drawing up plans for controlling water pollution, and briefly describe your strategy for controlling water pollution from each of the following sources: (a) a pipe from a factory discharging effluent into a stream, (b) a parking lot at a shopping mall bordered by a stream, and (c) a farmer’s field on a slope next to a stream.