What is a major drawback to using natural gas in place of oil?
A. Major changes in auto engines are required.
B. Driving range is much longer than oil.
C. Gas requires larger fuel tanks.
D. The demand for natural gas is much lower.
Answer: C
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90% of human body is made of stardust, because all the elements except for hydrogen and helium are created during the life cycle of stars.
a. true b. false
In which of the following cities would the smallest percentage of residents drive to work?
A) New York City B) London C) Paris D) Tokyo E) Berlin
Phytoremediation is:
A. A process that can reduce pollution in less than a year B. A process that has been used only in rural areas C. Only possible in areas with mild climates D. A slow process that may take many growing seasons to reduce pollution
Which of the following is NOT perceived as a negative to using GMO seeds?
A) Long-term GMO use may reduce effectiveness of antibiotics. B) Long-term GMO use could destroy long-standing ecological balances in local agriculture. C) There is an implicit long-term dependence on the United States as a supplier. D) Import markets are likely to reject foods not properly labeled as GMO. E) Long-term GMO use reduces the quality of the soil.