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  3. Energy and Public Lands The United States boasts substantial energy resources. Federal lands provide a good deal of US energ

Energy and Public Lands The United States boasts substantial energy resources. Federal lands provide a good deal of US energ

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问题                     Energy and Public Lands
    The United States boasts substantial energy resources. Federal lands provide a good deal of US energy production, the US Department of the Interior manages federal energy leasing(租赁)both on land and on the offshore Outer Continental Shelf. Production from these sources amounts to nearly 30 percent of total annual US energy production.
    In 2000, 32 percent of US oil, 35 percent of natural gas, and 37 percent of coal were produced from federal lands, representing 20,000 producing oil and gas leases and 135 producing coal leases. Federal lands are also estimated to contain approximately 68 percent of all undiscovered US oil reserves and 74 percent of undiscovered natural gas.
    Revenues from federal oil, gas, and coal leasing provide significant returns to US taxpayers as well as State Government. In 1999, for example, $553 million in oil and gas revenues were paid to the US Treasury, and non-India coal leases accounted for over $304 million in revenues, of which 50percent were paid to State governments. Public lands also play a critical role in energy delivery. Each year, federal land managers authorize rights of way for transmission lines, rail systems, pipelines, and other facilities related to energy production and use.
    Alternative energy production from federal lands falls behind conventional energy production, though the amount is still significant. For example, federal geothermal(地热)resources produce about 7.5 billion kilowatt-hours(千瓦时)of electricity per year, 47 percent of all electricity generated from US geothermal energy. There are 2,960 wind turbines on public lands in California alone, producing electricity for about 300,000 people. Federal hydropower facilities produce about 17 percent of all hydropower produced in the United States.
    Because of the growing US thirst for energy and increasing public unease with influence on foreign oil sources, pressure on public lands to meet US energy demand is becoming more intense. Public lands are available for energy development only after they have been evaluated through the land use planning process. If development of energy resources conflicts with management or use of other resources, development restrictions or impact moderation measures may be enforced, or mineral be banned altogether.
Geothermal resources, wind turbines, and hydropower facilities in Paragraph 4 cited as examples to illustrate that
选项 A、alternative energy production is no less than conventional energy production.
B、the amount of alternative energy production from public lands is huge.
C、they are the most typical conventional energy resources from public lands.
D、geothermal resources are more important than the other two.
答案B
解析 根据文章第四段可知，作者通过地热资源、风力涡轮发电机和水力发电举例说明这段话的主题。即第一句话“Alternative energy production from federal lands falls behind conventional energy production，though the amount is still significant．”。B选项说“在公共地区生产的替代能源的总量仍然很巨大”。
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