科学家称全球变暖现象或许可倒转
<p></p><p><span word="The">The</span> <span word="bioenergy">bioenergy</span> <span word="and">and</span> <span word="CCS">CCS</span> <span word="method">method</span> <span word="is">is</span> <span word="the">the</span> <span word="most">most</span> <span word="cost">cost</span>-<span word="effective">effective</span> <span word="way">way</span> <span word="of">of</span> <span word="tackling">tackling</span> <span word="carbon">carbon</span> <span word="emissions">emissions</span>, <span word="say">say</span> <span word="scientists">scientists</span>.</p><p> </p><p><span word="Global">Global</span> <span word="warming">warming</span> <span word="could">could</span> <span word="be">be</span> <span word="reversed">reversed</span> <span word="used">used</span> <span word="a">a</span> <span word="combination">combination</span> <span word="of">of</span> <span word="burning">burning</span> <span word="trees">trees</span> <span word="and">and</span> <span word="crops">crops</span> <span word="for">for</span> <span word="energy">energy</span>, <span word="and">and</span> <span word="capturing">capturing</span> <span word="and">and</span> <span word="storing">storing</span> <span word="carbon">carbon</span> <span word="dioxide">dioxide</span> <span word="underground">underground</span> (<span word="CCS">CCS</span>), <span word="according">according</span> <span word="to">to</span> <span word="an">an</span> <span word="analysis">analysis</span> <span word="by">by</span> <span word="scientists">scientists</span>. <span word="But">But</span> <span word="experts">experts</span> <span word="cautioned">cautioned</span> <span word="that">that</span> <span word="trying">trying</span> <span word="such">such</span> <span word="an">an</span> <span word="approach">approach</span> <span word="after">after</span> <span word="temperatures">temperatures</span> <span word="had">had</span> <span word="passed">passed</span> <span word="dangerous">dangerous</span> <span word="levels">levels</span> <span word="could">could</span> <span word="be">be</span> <span word="problematic">problematic</span>, <span word="as">as</span> <span word="climate">climate</span> <span word="change">change</span> <span word="reduced">reduced</span> <span word="the">the</span> <span word="number">number</span> <span word="of">of</span> <span word="trees">trees</span> <span word="available">available</span> <span word="for">for</span> "<span word="bioenergy">bioenergy</span>".</p><p><span word="The">The</span> <span word="bioenergy">bioenergy</span> <span word="and">and</span> <span word="CCS">CCS</span> <span word="method">method</span> <span word="was">was</span> <span word="the">the</span> <span word="most">most</span> <span word="cost">cost</span>-<span word="effective">effective</span> <span word="way">way</span> <span word="of">of</span> <span word="tackling">tackling</span> <span word="carbon">carbon</span> <span word="emissions">emissions</span>, <span word="said">said</span> <span word="the">the</span> <span word="team">team</span> <span word="Chalmers">Chalmers</span> <span word="University">University</span> <span word="of">of</span> <span word="Technology">Technology</span> <span word="in">in</span> <span word="Sweden">Sweden</span>, <span word="publishing">publishing</span> <span word="their">their</span> <span word="research">research</span> <span word="in">in</span> <span word="the">the</span> <span word="journal">journal</span> <span word="Environmental">Environmental</span> <span word="Research">Research</span> <span word="Letters">Letters</span> <span word="on">on</span> <span word="Thursday">Thursday</span>. <span word="Such">Such</span> <span word="an">an</span> <span word="approach">approach</span> <span word="could">could</span> <span word="offset">offset</span> <span word="and">and</span> <span word="even">even</span> <span word="reverse">reverse</span> <span word="other">other</span> <span word="emissions">emissions</span> <span word="from">from</span> <span word="fossil">fossil</span> <span word="fuels">fuels</span>, <span word="they">they</span> <span word="claimed">claimed</span>.</p><p><span word="The">The</span> <span word="lead">lead</span> <span word="author">author</span> <span word="of">of</span> <span word="the">the</span> <span word="study">study</span>, <span word="Prof">Prof</span> <span word="Christian">Christian</span> <span word="Azar">Azar</span>, <span word="said">said</span> <span word="it">it</span> <span word="could">could</span> <span word="help">help</span> <span word="bring">bring</span> <span word="temperatures">temperatures</span> <span word="down">down</span> <span word="even">even</span> <span word="if">if</span> <span word="they">they</span> <span word="rose">rose</span> <span word="above">above</span> <span word="the">the</span> 2<span word="C">C</span> <span word="level">level</span> <span word="that">that</span> <span word="world">world</span> <span word="leaders">leaders</span> <span word="have">have</span> <span word="agreed">agreed</span> <span word="to">to</span> <span word="avoid">avoid</span>: "<span word="Even">Even</span> <span word="if">if</span> <span word="current">current</span> <span word="political">political</span> <span word="gridlock">gridlock</span> <span word="causes">causes</span> <span word="global">global</span> <span word="warming">warming</span> <span word="in">in</span> <span word="excess">excess</span> <span word="of">of</span> 2<span word="C">C</span>, <span word="we">we</span> <span word="can">can</span> <span word="reverse">reverse</span> <span word="the">the</span> <span word="temperature">temperature</span> <span word="trend">trend</span> <span word="and">and</span> <span word="reach">reach</span> <span word="targets">targets</span> <span word="later">later</span>. <span word="This">This</span> <span word="means">means</span> <span word="that">that</span> 2<span word="C">C</span> <span word="targets">targets</span>, <span word="or">or</span> <span word="even">even</span> <span word="more">more</span> <span word="ambitious">ambitious</span> <span word="targets">targets</span>, <span word="can">can</span> <span word="remain">remain</span> <span word="on">on</span> <span word="the">the</span> <span word="table">table</span> <span word="in">in</span> <span word="international">international</span> <span word="climate">climate</span> <span word="negotiations">negotiations</span>."</p><p><span word="He">He</span> <span word="said">said</span> <span word="that">that</span> <span word="to">to</span> <span word="achieve">achieve</span> <span word="a">a</span> <span word="reversal">reversal</span> <span word="of">of</span> <span word="temperatures">temperatures</span>, <span word="the">the</span> <span word="combination">combination</span> <span word="of">of</span> <span word="bioenergy">bioenergy</span> <span word="and">and</span> <span word="CCS">CCS</span> <span word="would">would</span> <span word="need">need</span> <span word="to">to</span> <span word="be">be</span> <span word="combined">combined</span> <span word="with">with</span> <span word="a">a</span> <span word="huge">huge</span> <span word="expansion">expansion</span> <span word="in">in</span> <span word="renewable">renewable</span> <span word="energy">energy</span> <span word="or">or</span> <span word="nuclear">nuclear</span> <span word="power">power</span>, <span word="in">in</span> <span word="order">order</span> <span word="to">to</span> <span word="reduce">reduce</span> <span word="emissions">emissions</span> <span word="almost">almost</span> <span word="to">to</span> <span word="zero">zero</span>. <span word="He">He</span> <span word="also">also</span> <span word="admitted">admitted</span> <span word="that">that</span> <span word="there">there</span> <span word="was">was</span> <span word="a">a</span> <span word="political">political</span> <span word="risk">risk</span> <span word="that">that</span> <span word="the">the</span> <span word="proposal">proposal</span>'<span word="s">s</span> <span word="ability">ability</span> <span word="to">to</span> <span word="reverse">reverse</span> <span word="rises">rises</span> <span word="at">at</span> <span word="a">a</span> <span word="late">late</span> <span word="stage">stage</span> <span word="could">could</span> <span word="be">be</span> <span word="used">used</span> <span word="as">as</span> <span word="an">an</span> <span word="excuse">excuse</span> <span word="for">for</span> <span word="short">short</span>-<span word="term">term</span> <span word="inaction">inaction</span> <span word="on">on</span> <span word="emissions">emissions</span>.</p>
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