The most likely source of water polluting pathogens is _______.
Explain how replacing asphalt with gravel or other permeable material can improve water quality.
The most common source of infectious diseases in water supplies is _______.
More efficient plumbing reduces water pollution by _______.
The untreated sewage discharged by cruise ships is _______.
Explain why nonpoint source pollution is a greater threat and hazard than point source pollution.
Discriminate between the immediate and chronic effects of water pollution and explain why chronic pollution is a more serious long term threat.
Piles of aluminum cans floating at sea would be an example of _______.
Explain how heat can be a source of water pollution.
Explain why reducing surface runoff is the most general way to reduce water pollution.
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