研究：纯电动汽车不一定比汽油车更环保
<p><span word="People">People</span> <span word="who">who</span> <span word="own">own</span> <span word="all">all</span>-<span word="electric">electric</span> <span word="cars">cars</span> <span word="where">where</span> <span word="coal">coal</span> <span word="generates">generates</span> <span word="the">the</span> <span word="power">power</span> <span word="may">may</span> <span word="think">think</span> <span word="they">they</span> <span word="are">are</span> <span word="helping">helping</span> <span word="the">the</span> <span word="environment">environment</span>.</p><p>电动汽车的用电来自燃煤发电厂，使用电动汽车的人可能认为他们保护了环境。</p><p><span word="But">But</span> <span word="a">a</span> <span word="new">new</span> <span word="study">study</span> <span word="finds">finds</span> <span word="their">their</span> <span word="vehicles">vehicles</span> <span word="actually">actually</span> <span word="make">make</span> <span word="the">the</span> <span word="air">air</span> <span word="dirtier">dirtier</span>, <span word="worsening">worsening</span> <span word="global">global</span> <span word="warming">warming</span>.</p><p>但是一项新的研究表明，电动汽车实际上对空气污染更不利，且会加剧全球变暖。</p><p><span word="The">The</span> <span word="controversial">controversial</span> <span word="study">study</span> <span word="raises">raises</span> <span word="major">major</span> <span word="questions">questions</span> <span word="over">over</span> <span word="the">the</span> <span word="future">future</span> <span word="of">of</span> '<span word="green">green</span>' <span word="cars">cars</span>.</p><p>这项颇受争议的研究提出了有关“环保”车未来的一些问题。</p><p>'<span word="Unfortunately">Unfortunately</span>, <span word="when">when</span> <span word="a">a</span> <span word="wire">wire</span> <span word="is">is</span> <span word="connected">connected</span> <span word="to">to</span> <span word="an">an</span> <span word="electric">electric</span> <span word="vehicle">vehicle</span> <span word="at">at</span> <span word="one">one</span> <span word="end">end</span> <span word="and">and</span> <span word="a">a</span> <span word="coal">coal</span>-<span word="fired">fired</span> <span word="power">power</span> <span word="plant">plant</span> <span word="at">at</span> <span word="the">the</span> <span word="other">other</span> <span word="end">end</span>, <span word="the">the</span> <span word="environmental">environmental</span> <span word="consequences">consequences</span> <span word="are">are</span> <span word="worse">worse</span> <span word="than">than</span> <span word="driving">driving</span> <span word="a">a</span> <span word="normal">normal</span> <span word="gasoline">gasoline</span>-<span word="powered">powered</span> <span word="car">car</span>,' <span word="said">said</span> <span word="Ken">Ken</span> <span word="Caldeira">Caldeira</span> <span word="of">of</span> <span word="the">the</span> <span word="Carnegie">Carnegie</span> <span word="Institution">Institution</span> <span word="for">for</span> <span word="Science">Science</span>, <span word="who">who</span> <span word="wasn">wasn</span>'<span word="t">t</span> <span word="part">part</span> <span word="of">of</span> <span word="the">the</span> <span word="study">study</span> <span word="but">but</span> <span word="praised">praised</span> <span word="it">it</span>.</p><p>卡耐基科学研究所（<span word="Carnegie">Carnegie</span> <span word="Institution">Institution</span> <span word="for">for</span> <span word="Science">Science</span>）研究员肯·卡代拉（<span word="Ken">Ken</span> <span word="Caldeira">Caldeira</span>）说：“不幸的是，当一根线把电动车和一个燃煤发电厂连在一起时，造成的环境污染比普通的汽油车更严重。” 肯·卡代拉并未参与这项研究，但是对该研究表示赞赏。</p><p><span word="Driving">Driving</span> <span word="vehicles">vehicles</span> <span word="that">that</span> <span word="use">use</span> <span word="electricity">electricity</span> <span word="from">from</span> <span word="renewable">renewable</span> <span word="energy">energy</span> <span word="instead">instead</span> <span word="of">of</span> <span word="gasoline">gasoline</span> <span word="could">could</span> <span word="reduce">reduce</span> <span word="the">the</span> <span word="resulting">resulting</span> <span word="deaths">deaths</span> <span word="due">due</span> <span word="to">to</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="by">by</span> 70 <span word="percent">percent</span>, <span word="it">it</span> <span word="concluded">concluded</span>.</p><p>该研究指出，驾驶可再生能源发电的电动车来取代汽油车，可以使因空气污染造成的死亡率下降70%。</p>
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