As a result of measures to control acid-deposition in North America, over the last 20 years emissions of sulfur dioxide have been
A) steady, with little decrease in acid-deposition due to rising levels of nitrogen oxides.
B) reduced by about 10%, at great cost to the power producing industry.
C) reduced to target levels at about the projected cost of compliance.
D) reduced beyond target levels and at only a fraction of the industry-projected compliance costs.
D
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On the accompanying map, volcanic eruptions are most likely at locations
A) 1 and 2.
B) 2 and 3.
C) 3 and 4.
D) 1 and 3.
E) 2 and 5.
What is deformation, and what causes it? What is deformation, and what causes it?
Which of the following processes causes sea surface salinity to increase near the Tropics of Cancer and Capricorn?
A) Condensation B) Evaporation C) Freezing D) Melting E) Polarization
Which of the following describes the stage just before a storm becomes a fully developed hurricane?
A. cyclone B. tropical depression C. tropical disturbance D. tropical storm