中国空气污染是由什么造成的?
<p><span word="A">A</span> <span word="spike">spike</span> <span word="in">in</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="in">in</span> <span word="Beijing">Beijing</span> <span word="and">and</span> <span word="other">other</span> <span word="Chinese">Chinese</span> <span word="cities">cities</span> <span word="has">has</span> <span word="brought">brought</span> <span word="concern">concern</span> <span word="over">over</span> <span word="auto">auto</span> <span word="fumes">fumes</span> <span word="to">to</span> <span word="the">the</span> <span word="fore">fore</span> <span word="in">in</span> <span word="the">the</span> <span word="world">world</span>'<span word="s">s</span> <span word="largest">largest</span> <span word="car">car</span> <span word="market">market</span>, <span word="but">but</span> <span word="analysts">analysts</span> <span word="say">say</span> <span word="trucks">trucks</span> <span word="and">and</span> <span word="older">older</span> <span word="cars">cars</span>─<span word="rather">rather</span> <span word="than">than</span> <span word="new">new</span> <span word="passenger">passenger</span> <span word="vehicles">vehicles</span> -- <span word="lie">lie</span> <span word="at">at</span> <span word="the">the</span> <span word="heart">heart</span> <span word="of">of</span> <span word="China">China</span>'<span word="s">s</span> <span word="current">current</span> <span word="pollution">pollution</span> <span word="woes">woes</span>.</p><p>在中国这个世界最大的汽车市场，北京和其他中国城市的空气污染突然加剧，令人们对汽车尾气排放的担忧变得突出，但分析师说，中国当前污染祸患的重点是卡车和较为老旧的汽车，而不是新的乘用车。</p><p><span word="China">China</span> <span word="overtook">overtook</span> <span word="the">the</span> <span word="U">U</span>.<span word="S">S</span>. <span word="as">as</span> <span word="the">the</span> <span word="biggest">biggest</span> <span word="auto">auto</span> <span word="market">market</span> <span word="by">by</span> <span word="number">number</span> <span word="of">of</span> <span word="new">new</span> <span word="vehicles">vehicles</span> <span word="sold">sold</span> <span word="in">in</span> 2009. <span word="Last">Last</span> <span word="year">year</span>, <span word="Chinese">Chinese</span> <span word="customers">customers</span> <span word="bought">bought</span> 19.3 <span word="million">million</span> <span word="vehicles">vehicles</span>, <span word="a">a</span> <span word="figure">figure</span> <span word="the">the</span> <span word="semiofficial">semiofficial</span> <span word="China">China</span> <span word="Association">Association</span> <span word="of">of</span> <span word="Auto">Auto</span> <span word="Manufacturers">Manufacturers</span> <span word="forecasts">forecasts</span> <span word="will">will</span> <span word="grow">grow</span> <span word="a">a</span> <span word="further">further</span> 7% <span word="this">this</span> <span word="year">year</span>.</p><p>2009年，以新车销量计算，中国取代美国成为世界最大的汽车市场。去年中国消费者总共购买了1,930万辆车，根据半官方的中国汽车工业协会的预测，这个数字今年还将增长7%。</p><p><span word="A">A</span> <span word="fourth">fourth</span> <span word="day">day</span> <span word="of">of</span> <span word="severe">severe</span> <span word="pollution">pollution</span> <span word="across">across</span> <span word="large">large</span> <span word="parts">parts</span> <span word="of">of</span> <span word="China">China</span> <span word="has">has</span> <span word="put">put</span> <span word="scrutiny">scrutiny</span> <span word="on">on</span> <span word="industries">industries</span> <span word="that">that</span> <span word="contribute">contribute</span> <span word="to">to</span> <span word="China">China</span>'<span word="s">s</span> <span word="pollution">pollution</span> <span word="problems">problems</span>, <span word="including">including</span> <span word="auto">auto</span> <span word="makers">makers</span>, <span word="power">power</span> <span word="companies">companies</span>, <span word="steel">steel</span> <span word="makers">makers</span> <span word="and">and</span> <span word="other">other</span> <span word="firms">firms</span>.</p><p>中国大片地区的重度污染情况进入第四天，造成中国污染问题的一些行业因此受到人们审视，其中包括汽车制造商、电力公司、钢厂和其他一些公司。</p>
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