Instead of only generating more electricity, rising energy demands may also be met by ________
A) switching from coal and natural gas to windmills and solar technologies
B) switching from natural gas to coal
C) increasing the efficiency of energy consumption
D) using more nuclear power instead of fossil fuels
E) building more coal-burning power plants
C
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Care and proper management of the world's biomes are necessary to maintain sustainability. However, some ecosystems are in better condition than others. Which one of the following regions appears to be healthiest and best managed today?
A) Tropical forests in South America B) Forests in the United States C) Coral reefs throughout the world D) Mangroves in southeast Asia
In most developed countries, an epidemiologic transition
A) was followed by a fertility transition, resulting in a demographic transition. B) prevented a fertility transition, resulting in a demographic transition. C) resulted from increased deaths due to epidemics and social conditions. D) was followed by an increase in birth rates and an increase in death rates.
Hurricanes develop most often in the late summer when ocean waters have reached what temperature?
A) 70°F B) 100°F C) 50 °F D) 80°F E) 60°F
A low, lumpy cloud layer that appears in rows, patches or rounded masses would be classified ____
A) nimbostratus B) stratus C) cumulus D) stratocumulus