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Fossil fuels still account for ______ of U.S.energy production.
Q25: When talking about the formation of fossil
Q27: All of the following are considered sustainable
Q28: What are biofuels,and what are potential biofuel
Q45: Which of the following is a TRUE
Q52: The Irish potato famine was caused by
Q52: You are working on a ranch and
Q53: The net loss of trees in a
Q58: How would the production of cellulosic ethanol
Q60: Which of the following is best described
Q69: The time it takes for half of