Underground Coal Fires Coal burning deep underground in China, India and Indonesia is threatening the environment and human

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问题                         Underground Coal Fires
    Coal burning deep underground in China, India and Indonesia is threatening the environment and human life, scientists have warned. These large-scale【C1】______blazes(火焰)cause the ground temperature to heat up and kill surrounding vegetation, produce greenhouse gases and can【C2】______ ignite(点燃)forest fires, a group of scientists told the annual meeting of the American Association for the Advancement of Science in Denver. The resulting【C3】______of poisonous elements like mercury can also pollute local water sources and soils, they warned.
    "Coal fires are a global disaster, " said Associate Professor Glenn Stracher of East Georgia College in Swainsboro, USA. But【C4】______few people know about them.
    Coal can heat up on its own, and eventually catch fire and burn, if there is a continuous oxygen supply. The heat produced is not caused to【C5】______and under the right combinations of sunlight and oxygen, can trigger spontaneous(自发的)catching fire and burning. This can occur underground, in coal stockpiles, abandoned mines or even as coal is transported.【C6】______fires in China consume up to 200 million tons of coal per year, delegates were told. In【C7】______, the U. S. economy consumes about one billion tons of coal annually, said Stracher, 【C8】______analysis of the likely impact of coal fires has been accepted for publication in the International Journal of Coal Ecology.【C9】______underway, coal fires can burn for decades, even centuries. In the process, they release large【C10】______of greenhouse gases, poisonous fumes and black particles into the atmosphere.
    The members of the panel discussed the【C11】______these fires may be having on global and regional climate change, and agreed that the underground nature of the fires makes them difficult to【C12】______.
    Ultimately, the remote sensing and other techniques should allow scientists to【C13】______how much carbon dioxide these fires are emitting(释放). One suggested【C14】______of containing the fires was presented by Gary Colaizzi, of the engineering firm Goodson, which has developed a heat-resistant grout (灌浆), which is designed to be pumped into the coal fire to【C15】______the oxygen supply.
【C14】

选项 A、cause
B、treatment
C、rule
D、method

答案D

解析 Gary Colaizzi提出的是一种控制这些火焰的方法,因此用method来表示。cause原因,动机;treatment治疗,疗法;rule规则,规定;method方法,方式。
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