The U.S. Environmental Protection Agency establishes drinking water standards to
A. determine how much water each state can use on a yearly basis.
B. control the bottled drinking water industry.
C. set a safe limit on the concentration of select contaminants in groundwater.
Answer: C
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Overall, nonrenewable resources have a lower net energy than renewable resources.
Answer the following statement true (T) or false (F)
All the following are associated with the innate immune system except
A) sweat. B) skin. C) T cells. D) the inflammatory response.
Seasons are a result of ________
A) differences in the amount and intensity of sunlight brought about by the tilt of Earth's axis B) the phases of the moon C) changes in day length D) differences in the distance between Earth and the sun E) alterations in Hadley cells
Chloroform has a normal boiling point of 61.7°C. Which of the following is true?
A) At any temperature the vapor pressure of chloroform is less than that of water. B) Chloroform is more volatile than water. C) Both a and b are correct. D) Neither a. nor b is correct.