Which of the following would have most likely prevented the deadly 1948 smog in Donora, PA?
A) The shift of industrial production from the day to evening hours
B) The addition of scrubbers to the smokestacks used by the Donora industries in order to remove effluents
C) Increased use of coal to generate electricity and heat homes in the region
D) Use of high sulfur instead of low sulfur coal to generate electricity and heat homes
B
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At the edge of a cliff you throw one ball downward and another ball upward at the same speed. With negligible air resistance, which ball hits the ground faster?
A. The ball thrown upward. B. The ball thrown downward. C. Both hit with the same speed but not at the same time. D. none of the above
Polyculture lessens the need for fertilizer and water
Indicate whether the statement is true or false
One of the effects of the disappearance of pluvial lakes was the formation of thick sequences of evaporites
a. True b. False
The ________ tide component tends to make high tides appear about one hour later each day.
A. declinational B. diurnal C. semidiurnal D. lunar E. solar