Which of the following is a secondary air pollutant?
A) radon
B) sulfur dioxide
C) ozone
D) nitrogen oxide
E) carbon monoxide
Answer: C
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Nuclear power will probably continue to be a part of energy production, particularly in countries that lack fossil-fuel reserves.
Answer the following statement true (T) or false (F)
Porosity is the term that describes the amount of void space within a material. What explains why porosity is important with respect to soils?
A. provides plant roots access to moisture and oxygen B. provides space for the breakdown of aluminum minerals C. makes soils less compactable D. allows iron oxides to accumulate E. reduces the ability of erosion to strip away topsoil
Which of the following is primarily for loss of tropical forests in Indonesia?
A. oil palm plantations B. firewood C. sugar cane plantations D. cattle grazing
Mutagens directly change molecules of
a. water b. carbohydrate c. DNA d. fat e. RNA