2015考研英语阅读气候变化与农作物
<p> <span word="Climate">Climate</span> <span word="change">change</span> <span word="and">and</span> <span word="crops">crops</span></p><p> 气候变化与农作物</p><p> <span word="Hindering">Hindering</span> <span word="harvests">harvests</span></p><p> 妨害产量</p><p> <span word="Changes">Changes</span> <span word="in">in</span> <span word="the">the</span> <span word="climate">climate</span> <span word="are">are</span> <span word="already">already</span> <span word="having">having</span> <span word="an">an</span> <span word="effecton">effecton</span> <span word="crop">crop</span> <span word="yieldsbut">yieldsbut</span> <span word="not">not</span> <span word="yet">yet</span> <span word="a">a</span> <span word="very">very</span> <span word="big">big</span> <span word="one">one</span></p><p> 气候变化已经对农作物产量造成影响但是迄今影响不大</p><p> <span word="May">May</span> 5<span word="th">th</span> 2011 | <span word="from">from</span> <span word="the">the</span> <span word="print">print</span> <span word="edition">edition</span></p><p> <span word="THE">THE</span> <span word="problems">problems</span> <span word="climate">climate</span> <span word="change">change</span> <span word="looks">looks</span> <span word="likely">likely</span> <span word="to">to</span> <span word="bring">bring</span> <span word="inthe">inthe</span> <span word="future">future</span> <span word="may">may</span> <span word="increasingly">increasingly</span> <span word="be">be</span> <span word="visible">visible</span> <span word="in">in</span> <span word="the">the</span> <span word="recordsof">recordsof</span> <span word="the">the</span> <span word="past">past</span>. <span word="Not">Not</span> <span word="just">just</span> <span word="in">in</span> <span word="the">the</span> <span word="far">far</span>-<span word="off">off</span> <span word="ages">ages</span> <span word="of">of</span> <span word="surging">surging</span> <span word="sea">sea</span> <span word="levels">levels</span> <span word="following">following</span> <span word="ice">ice</span>-<span word="age">age</span> <span word="thaws">thaws</span>, <span word="spikes">spikes</span> <span word="inprehistoric">inprehistoric</span> <span word="temperatures">temperatures</span> <span word="correlated">correlated</span> <span word="with">with</span> <span word="natural">natural</span> <span word="releases">releases</span> <span word="of">of</span> <span word="greenhouse">greenhouse</span> <span word="gas">gas</span> <span word="and">and</span> <span word="ancientcivilisations">ancientcivilisations</span> <span word="brought">brought</span> <span word="low">low</span> <span word="by">by</span> <span word="drought">drought</span>, <span word="but">but</span> <span word="in">in</span> <span word="records">records</span> <span word="from">from</span> <span word="living">living</span> <span word="memorywhich">memorywhich</span> <span word="are">are</span> <span word="based">based</span> <span word="onreliable">onreliable</span> <span word="measurements">measurements</span> <span word="made">made</span> <span word="at">at</span> <span word="the">the</span> <span word="time">time</span>. <span word="Using">Using</span> <span word="such">such</span> <span word="data">data</span> <span word="researchers">researchers</span> <span word="have">have</span> <span word="now">now</span> <span word="compiled">compiled</span> <span word="anestimate">anestimate</span> <span word="of">of</span> <span word="global">global</span> <span word="changes">changes</span> <span word="in">in</span> <span word="crop">crop</span> <span word="yields">yields</span> <span word="which">which</span> <span word="can">can</span> <span word="be">be</span> <span word="put">put</span> <span word="down">down</span> <span word="to">to</span> <span word="recent">recent</span> <span word="increases">increases</span> <span word="intemperature">intemperature</span> <span word="and">and</span> <span word="decreases">decreases</span> <span word="in">in</span> <span word="rainfall">rainfall</span> . <span word="The">The</span> <span word="bad">bad</span> <span word="news">news</span> <span word="is">is</span> <span word="that">that</span> <span word="they">they</span> <span word="find">find</span> <span word="that">that</span> <span word="climate">climate</span> <span word="changehas">changehas</span> <span word="lowered">lowered</span> <span word="the">the</span> <span word="amount">amount</span> <span word="of">of</span> <span word="maize">maize</span> <span word="and">and</span> <span word="wheat">wheat</span> <span word="produced">produced</span> <span word="in">in</span> <span word="a">a</span> <span word="given">given</span> <span word="area">area</span>.<span word="The">The</span> <span word="good">good</span> <span word="news">news</span> <span word="is">is</span> <span word="that">that</span> <span word="the">the</span> <span word="effect">effect</span> <span word="is">is</span> <span word="so">so</span> <span word="far">far</span> <span word="reasonably">reasonably</span> <span word="small">small</span>.</p><p> 冰河融化后的远古时代，海平面急剧上升，由于温室气体的自然释放，气温处于史前时代最高峰，古代文明由于干旱而衰落。在记忆可及的近代，人们根据可靠的测量对气候变化做了记录。根据过去的这些记录，气候变化可能造成的影响，在未来也许会越来越明显。研究人员利用这些数据，现在已经对全球农作物产量的变化做出了估计。农作物产量变化的原因可能是近来气温的升高和降水的减少。消息有好有坏。坏消息是，他们发现，在上述地区气候变化使玉米和小麦减产。好消息是，迄今为止气候变化的影响相当小。</p>
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