Unit Test — Unit test Answers

Desalination has no known negative impacts on the environment.

Algal blooms, and the rapid proliferation of photosynthetic plankton can ultimately end up depleting all the oxygen from a body of water.

Which of the following most significantly determines a community's access to potable water? a. access to clean raw water sources b. the availability of money c. local drought conditions d. the level of industrial development Please select the best answer from the choices provided

What is a key difference between greywater use and water reclamation? a. If collected separately, greywater can be used for certain applications without treatment. b. Greywater use is more costly than water reclamation. c. Water from reclamation is always safe for drinking, while greywater is not. d. Greywater has been mixed with sewage, while reclaimed water is derived from clean water. Please select the best answer from the choices provided

Introduced sewage in water systems _______.a.decreases levels of phosphorus and nitrogenb.increases oxygen levelsc.increases concentrations of solidsd.leads to decreases in the temperature