Global warming may be caused in part by the use of ______ for energy
a. coal d. hydrogen
b. wind power e. solar power
c. atomic energy
A
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What was the primary reason that the beaver and songbird populations were also diminished from the area?
A) The wolf population was feeding on the beaver and songbirds. B) The rivers were full of sediment, making it difficult for beaver to swim and songbirds to drink water. C) The elk population was feeding on the beaver and songbirds. D) The temperatures in the area were warming, making it difficult for the beavers and songbirds to survive in warmer weather. E) The plants that the beaver and songbirds ate were diminishing, because of the elk's increased herbivore pressure.
When a tornado is at its peak width, it is in this stage of its life cycle
A) wall cloud. B) mature. C) rope. D) shrinking. E) organizing.
The famous Khyber Pass, a major chokepoint into Afghanistan, is located in the North West Frontier.
a. true b. false
Internet penetration rates are generally low in Europe
Indicate whether the statement is true or false