What is the major impediment to using solar cells to replace electricity made from fossil-fuel burning power plants?
A. high cost
B. negative net energy yield
C. government regulations
D. inadequate technology
Answer: A
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Which one of these personalities was not a leader of the former Soviet Union
A. Gorbachev B. Khrushchev C. Solzhenitsyn D. Lenin
The modern view of uniformitarianism states that although processes have remained the same
through geologic time, rates have changed. Sometimes the term ________ is used for this modern view of uniformitarianism Fill in the blank(s) with the appropriate word(s).
What did the Cassini spacecraft and its Huygens probe discover on the surface of Titan, the largest of Saturn's moons?
A. Networks of drainages were apparently carved by liquids. B. The surface was nearly completely covered by impact craters. C. There was a large impact crater that nearly blasted the moon apart. D. None of these choices are correct.
The most effective and practical way of reducing CO2 emissions is to ________.
A. make many small changes over all of the human population that act like 'wedges' reducing emissions B. switch to all renewable energy as soon as possible C. There is no problem with climate change, so we do not need to do anything. D. stop all industry that emits CO2 regardless of the economic problems it may cause