中国空气中缺少灰尘反而使污染更严重?
<p><span word="Airborne">Airborne</span> <span word="dust">dust</span> <span word="is">is</span> <span word="normally">normally</span> <span word="seen">seen</span> <span word="as">as</span> <span word="an">an</span> <span word="environmental">environmental</span> <span word="problem">problem</span>, <span word="but">but</span> <span word="the">the</span> <span word="lack">lack</span> <span word="of">of</span> <span word="it">it</span> <span word="is">is</span> <span word="making">making</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="over">over</span> <span word="China">China</span> <span word="considerably">considerably</span> <span word="worse">worse</span>.</p><p>虽然空气中的灰尘通常会被视为一个环境问题，但缺乏灰尘反而会对中国的空气污染造成相当严重的影响。</p><p><span word="A">A</span> <span word="new">new</span> <span word="study">study</span> <span word="suggests">suggests</span> <span word="less">less</span> <span word="dust">dust</span> <span word="means">means</span> <span word="more">more</span> <span word="solar">solar</span> <span word="radiation">radiation</span> <span word="hits">hits</span> <span word="the">the</span> <span word="land">land</span> <span word="surface">surface</span>, <span word="which">which</span> <span word="reduces">reduces</span> <span word="wind">wind</span> <span word="speed">speed</span>. <span word="That">That</span> <span word="lack">lack</span> <span word="of">of</span> <span word="wind">wind</span> <span word="in">in</span> <span word="turn">turn</span> <span word="leads">leads</span> <span word="to">to</span> <span word="an">an</span> <span word="accumulation">accumulation</span> <span word="of">of</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="over">over</span> <span word="heavily">heavily</span> <span word="populated">populated</span> <span word="parts">parts</span> <span word="of">of</span> <span word="China">China</span>.</p><p>一项最新研究表明，较少的灰尘意味着更多的太阳辐射到达地面，这降低了风速。而风力不足会转而导致中国人口稠密地区空气污染的积聚。</p><p><span word="The">The</span> <span word="researchers">researchers</span> <span word="found">found</span> <span word="that">that</span> <span word="reduced">reduced</span> <span word="dust">dust</span> <span word="levels">levels</span> <span word="cause">cause</span> <span word="a">a</span> 13% <span word="increase">increase</span> <span word="in">in</span> <span word="human">human</span>-<span word="made">made</span> <span word="pollution">pollution</span> <span word="in">in</span> <span word="the">the</span> <span word="region">region</span>.</p><p>研究人员发现，由于空气中灰尘减少，导致人为因素引发的空气污染上升了13%。</p>
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