What is the principle behind wetlands-based sewage treatment systems?
A. To mimic natural processes in a series of tanks filled with aquatic plants.
B. To use high strength chemicals to disinfect large amounts quickly.
C. To let nature take care of it by dumping raw sewage in rivers.
D. To simply pour sewage into existing, unlined natural wetlands.
Answer: A
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Which of the following objects would be best at scattering light?
A) A
B) B
C) C
D) D
Tides that occur when the Sun and Moon are at right angles to one another and have wave-generating
abilities that cancel each other out are ____________________ tides. Fill in the blank(s) with the appropriate word(s).
A volcano that erupts with frequent, moderate eruptions is more likely to increase biodiversity than is a volcano that erupts with major eruptions
Indicate whether the statement is true or false
Which of the following statements is false?
A. In the less-developed countries of Africa, Asia, and Latin America, there is less indoor air pollution than in developed countries. B. The likelihood of having radon gas in your home depends largely upon the geology and soil types in your region. C. One of the reasons indoor air pollutants are so dangerous is the high amount of time people are indoors. D. According to the EPA, toxic air pollutants are generally much more concentrated indoors than outdoors. E. All of these statements are true.