Here is a question about this article: Energy sources unsuitable for mobile power plants, such as nuclear power, renewable hydroelectricity, or wind power can be used. According to widely accepted global energy reserve statistics, the reserves of liquid fuel are much less than gas and coal (at 42, 167 and 416 years respectively). Most countries with large rail networks do not have significant oil reserves and those that did, like the United States and Britain, have exhausted much of their reserves and have suffered declining oil output for decades. Therefore, there is also a strong economic incentive to substitute other fuels for oil. Rail electrification is often considered an important route towards consumption pattern reform. However, there are no reliable, peer-reviewed studies available to assist in rational public debate on this critical issue, although there are untranslated Soviet studies from the 1980s.
What is the answer to this question: What type of natural resources is more scarce?
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So... liquid fuel


Here is a question about this article: The Zipingpu Hydropower Plant (simplified Chinese: 紫坪铺水库; traditional Chinese: 紫坪鋪水庫) located 20 km east of the epicenter was damaged. A recent inspection indicated that the damage was less severe than initially feared, and it remains structurally stable and safe. The Tulong reservoir upstream is in danger of collapse. About 2,000 troops have been allocated to Zipingpu, trying to release the pressure through spillway. In total, 391 dams, most of them small, were reported damaged by the quake.
What is the answer to this question: How near to the epicenter was the power plant?
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So... 20 km


Here is a question about this article: In a small minority of Muslim countries, the law requires women to cover either just legs, shoulders and head or the whole body apart from the face. In strictest forms, the face as well must be covered leaving just a mesh to see through. These rules for dressing cause tensions, concerning particularly Muslims living in Western countries, where restrictions are considered both sexist and oppressive. Some Muslims oppose this charge, and instead declare that the media in these countries presses on women to reveal too much in order to be deemed attractive, and that this is itself sexist and oppressive.
What is the answer to this question: How many Muslim nations require women to cover their legs, shoulders, or whole body?
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So...
a small minority