Increases in ____ in the atmosphere due to human activities have resulted in what has been referred to as the enhanced greenhouse effect
a. aerosols
b. nitrogen
c. holes in the ozone layer
d. carbon dioxide
e. pressure
d
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High-level nuclear waste is presently stored in water-filled pools at each nuclear reactor site. Indicate whether the statement is true or false
An accumulation of sediment found along the landward margin of the ocean or lake is called a _________
Fill in the blank(s) with the appropriate word.
Which of the following are unusual about Uranus?
A. Its orbit sometimes takes it closer to the Sun than Mars. B. Its axis of rotation, orientation of rings, and orbits of its moons are perpendicular to those of every other planet in the solar system. C. It has been reclassified as a dwarf planet. D. Ice on its surface has an unusual bluish-green color. E. None of these choices are correct.
Between a river and its floodplain, you might find ________
A) natural levees B) deltas C) distributaries D) meanders