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 are too light and blow away.
C) They do not absorb ultraviolet radiation.
D) all of the above
E) only A and B
A
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When coastal waters grow significantly warmer in Peru, the fishermen there know that a(n) ____________________ ____________________ event is occurring
Fill in the blank(s) with correct word
Research by social scientists suggests that it takes ____ percent of the population of a community, country, or the world to bring about major social change.
A. 1?2 B. 5?10 C. 20?30 D. 40?50 E. 70?75
What type of faults are associated with fault-block mountains?
What will be an ideal response?
Which of the following would be true if Earth did not have an inclined axis?
A) The poles would not have ice caps. B) The equator would have 24 hours of daylight throughout the year. C) The Northern Hemisphere would always be tilted towards the sun. D) Earth would not have seasons.