The quickest and cheapest way to slow the buildup of carbon dioxide in the atmosphere is to
A. switch from fossil fuels to nuclear fuels.
B. increase the efficiency of energy use.
C. put a price on carbon dioxide emissions.
D. stop deforestation.
E. slow population growth.
Answer: B
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A chunk of clay in outer space moves at 3 m/s and has an inelastic collision with a half-as-massive chunk initially at rest. Compared to the initial kinetic energy of the 3-m/s chunk, the kinetic energy of the coupled chunks is
A. two-thirds. B. one-third. C. three-quarters. D. not enough information
When the dollar appreciates in foreign-exchange markets relative to other currencies, it can
A) buy more goods and services from other countries. B) buy fewer goods and services from other countries. C) buy a steady amount of goods and services from other countries. D) buy more goods but fewer services from other countries. E) buy fewer goods but more services from other countries.
Which philosopher formulated the economic and social ideals of communism?
a. Karl Marx b. Karl Popper c. Josef Stalin d. Adolf Hitler e. Vladimir Lenin
The geometry of the covalent bonds shared by the hydrogen atoms and oxygen atom in a water molecule account for its polarity
Indicate whether the statement is true or false