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  3. Air pollution killed about seven million people last year, making it the world’s single biggest environmental health risk, the W

Air pollution killed about seven million people last year, making it the world’s single biggest environmental health risk, the W

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问题     Air pollution killed about seven million people last year, making it the world’s single biggest environmental health risk, the World Health Organisation (WHO) says. The【C1】________a doubling of previous estimates, means one in eight of all global deaths were linked to polluted air. This means air pollution has【C2】________poor diet, high blood pressure and tobacco smoke as the leading【C3】________of preventable death worldwide. It also shows how【C4】________pollution inside and outside of people’s homes could save millions of lives in future.
    Air pollution deaths are most【C5】________from heart disease, strokes or lung disease. It is also linked to deaths from lung cancer and【C6】________breathing infections. "The evidence【C7】________the need for concerted action to clean up the air we all breathe," said Maria Neira, an official from WHO. "The risks from air pollution are now far greater than previously thought or understood, particularly for heart disease and strokes."
    Poor and middleincome countries in Southeast Asia and the Western Pacific region had the largest number of air pollution-related deaths, with 3.3 million deaths linked to indoor air pollution and 2.6 million deaths to outdoor air pollution. Indoor pollution is mostly caused by cooking【C8】________coal, wood stoves. The WHO estimates that around 2.9 billion people worldwide live in homes using wood or coal as their【C9】________cooking fuel. Outdoors, air is mainly polluted by transport, power generation, industrial and agricultural emissions and residential【C10】________and cooking. Research suggests outdoor air pollution【C11】________levels have risen significantly in some parts of the world, particularly in【C12】________ countries with large populations【C13】________rapid industrialization.
    Carlos Dora, a WHO public health expert, called on governments and health【C14】________to act on the evidence and【C15】________policies to reduce air pollution, which【C16】________would improve health and reduce humans’【C17】________on climate change. "Excessive air pollution is often a by-product of unsustainable policies in【C18】________such as transport, energy, waste management and industry, " he said. "In most cases, healthier【C19】________will also be more economical in the long term due to healthcare cost savings as well as climate【C20】________."
【C15】
选项 A、discuss
B、devise
C、take
D、change
答案B
解析 本句提到卡洛斯.多拉呼吁各国政府减少空气污染(to reduce air pollution)，其中一个举措是要act on the evidence(按照证据采取行动)，因此推测空格处单词与policy搭配后应能实现减少空气污染的目的。B项devise意为“制定”，制定政策能够实现这个目的。A项discuss“讨论”，光是讨论政策不会实现减少空气污染的目的。C项take与policy搭配不当。D项change“改变”，上下本没有依据推断卡洛斯.多拉呼吁改变政策。
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