Which of the following is the major source of outdoor air pollution?

A. burning of fossil fuels
B. volcanoes
C. agricultural activities
D. meteorite impacts


Answer: A

Environmental & Atmospheric Sciences

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Cycads evolved during the Triassic. Indicate whether the statement is true or false

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The formulas Mg2SiO4 and Fe2SiO4 represent:

a. two separate minerals b. two minerals that have related physical properties c. two nonrelated minerals d. two end members of a solid solution series

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The heat index (HI) is used by the National Weather Service, and combines ____ with ____ to determine an apparent temperature

a. dew point temperature; mixing ratio b. mixing ratio; saturation vapor pressure c. actual vapor pressure; specific humidity d. air temperature; relative humidity e. air temperature; specific humidity

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What is the latest supercontinent?

a. Supercontinent Laramide b. Supercontinent Pannotia c. Supercontinent Rodinia d. Supercontinent Pangaea

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