What is the principal source of acid rain?
A. Nuclear power plants
B. Coal-fired and natural gas power plants
C. Methane from oil refineries
D. Volcanic gases
Answer: B
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A funnel cloud or tornado may develop from a rotating cloud that extends beneath a severe thunderstorm. Which of the following is the name for this rotating cloud?
A. roll cloud B. wall cloud C. mammatus cloud D. anvil cloud
What factor triggered (caused the start of) the December 1991 debris flows at Caraballeda, Venezuela?
A. Steep slopes B. Excessive rains C. Urban development
Keeping energy prices artificially low ________
A) has no effect on the amount of air pollution in the United States B) will reduce inflation C) prevents manufacturing from wasting energy in production of good D) encourages use of renewable energy sources E) encourages waste and rapid depletion of energy resources
Pollutants that enter the atmosphere directly, for example from smokestacks and tail pipes, are called secondary air pollutants
a. True b. False