What is the greatest contributing factor in the loss of polar bears in arctic areas?
A) decline in sea ice
B) the tundra shifting northward
C) fires in the taiga and tundra
D) the decline of lemmings; the primary food of the polar bear
E) hunting of the polar bear by the Inuit people
A
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What cultural bias has created problems with China's one-child policy?
A. strong preference for boys B. refusal by men to wear condoms C. expensive health care D. lack of available contraceptives
Which country of Europe has a large Muslim migrant population?
A) Ireland B) France C) Switzerland D) Lithuania E) Poland
All the following are major steps to controlling air pollution except ________
A) finding cures for the diseases caused by air pollutants B) developing agreements among countries to limit air pollution C) determination of major sources of pollutants D) implementing strategies to meet the air pollution standards E) identification of the pollutants
The energy received on Earth decreases dramatically with distance from the sun because ________
A) of dust and gas in space B) of the decay of photons C) of the inverse square law D) Earth is not in the direction in which the Sun's emissions are strongest E) of the first law of thermodynamics