What is the main difficulty in trying to eliminate chlorinated fluorocarbons from the atmosphere?
A. They are very stable and take a long time to decompose completely.
B. They do not absorb ultraviolet radiation.
C. They are too light and blow away.
D. all of the above
E. only a and b
Answer: A
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Which of the following microclimate effects is incorrectly described?
a. The leeward sides of high mountains tend to show relatively dry conditions. b. Oceans and lakes modify temperature extremes. c. Mountains interrupt the flow of prevailing winds. d. Cities tend to have lower temperatures and higher wind speeds than the surrounding countryside. e. The windward sides of high mountains tend to show relatively wet conditions.
The best known system for determining world climate patterns is the ________
Fill in the blank(s) with correct word
Which soil horizon can be found above an A horizon?
a. B b. C c. E d. O e. R
Bioremediation is a restoration strategy that
A. determines that a contaminated site is healthy because one species can thrive on it B. brings in different species to see which ones will thrive best in a polluted area C. uses living organisms such as plants and bacteria to eliminate toxins from the ecosystem D. is a labor-intensive process where contaminated soil must be removed and replaced before plants and animals can grow