Air pollution in Tehran ________
A) is caused primarily by vehicles unequipped with pollution control technology
B) is caused mainly by very high levels of CFCs and acid deposition
C) comes primarily from burning fuel wood
D) has been reduced by 90% thanks to strict air pollution laws
E) is far less serious than in Los Angeles
A
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Jews and Muslims share a religious taboo against eating pork
Indicate whether the statement is true or false.
The third-most abundant gas in Earth's atmosphere (not including water vapor) is
A) oxygen. B) argon. C) nitrogen. D) carbon dioxide. E) helium.
In which of the following countries do 80 percent of the villages lack all-weather roads?
A) Japan B) France C) Austria D) India E) New Zealand
Underground water is a weak ________ acid
A) citric B) sulfuric C) tannic D) nitric E) carbonic