Water Pollution Answers

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Nonpoint source pollution is difficult to control because it _______.

comes from a direct point of origin

comes from a variety of sources

remains the same over time

none of the above

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Which of the following best describes the effects of water pollution on aquatic ecosystems?

It can result in fish kills and restrictions on human consumption.

It can change the physiology of fish.

It can cause long-term alterations of aquatic ecosystems.

All of the above

Introduced sewage in water systems _______.

decreases levels of phosphorus and nitrogen

increases oxygen levels

increases concentrations of solids

leads to decreases in the temperature

To be considered a source of water pollution, the source must include a chemical. Please select the best answer from the choices provided

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