What does the word smog mean? Explain the difference between Los Angeles-type smog and London-type smog
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ANSWER: The word smog originally meant the combining of smoke and fog. Today, however, the word mainly refers to the type of smog that forms in large cities, such as Los Angeles. Because this type of smog forms when chemical reactions take place in the presence of sunlight (called photochemical reactions), it is termed photochemical smog, or Los Angeles–type smog. When the smog is composed of sulfurous smoke and foggy air, it is usually called London-type smog.
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Name the four regions that dominate global trade flows
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Current photovoltaic technology uses sunlight to generate electricity
A) with a single structure in a single step. B) by heating water and using microscopic hydroturbines. C) in the process of microfusion. D) while generating small amounts of methane for use as a fuel in other applications.
Low sun angles result in reduced solar energy because:
A) day lengths are shorter. B) absorption is reduced. C) energy is spread over a larger area. D) Sun - Earth distance is greater.
For the graph shown above of animal species A and animal species B, which animal is the predator and which animal is the prey species?
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