2011四六级写作背诵范文精选21篇(四)
<p> 4. <span word="Air">Air</span> <span word="Pollution">Pollution</span></p><p> <span word="Air">Air</span> <span word="pollution">pollution</span> <span word="is">is</span> <span word="one">one</span> <span word="of">of</span> <span word="the">the</span> <span word="major">major</span> <span word="problems">problems</span> <span word="of">of</span> <span word="the">the</span> <span word="modern">modern</span> <span word="world">world</span>. <span word="A">A</span> <span word="great">great</span> <span word="deal">deal</span> <span word="of">of</span> <span word="energy">energy</span> <span word="is">is</span> <span word="needed">needed</span> <span word="to">to</span> <span word="run">run</span> <span word="the">the</span> <span word="factories">factories</span> <span word="of">of</span> <span word="modern">modern</span> <span word="industrial">industrial</span> <span word="nations">nations</span>. <span word="Automobile">Automobile</span>, <span word="trains">trains</span>, <span word="planes">planes</span> <span word="and">and</span> <span word="busses">busses</span> <span word="need">need</span> <span word="energy">energy</span>, <span word="too">too</span>. <span word="Nearly">Nearly</span> <span word="all">all</span> <span word="of">of</span> <span word="this">this</span> <span word="energy">energy</span> <span word="is">is</span> <span word="produced">produced</span> <span word="by">by</span> <span word="burning">burning</span> <span word="fuels">fuels</span>. <span word="The">The</span> <span word="burning">burning</span> <span word="produces">produces</span> <span word="wastes">wastes</span>, <span word="some">some</span> <span word="of">of</span> <span word="which">which</span> <span word="remain">remain</span> <span word="in">in</span> <span word="the">the</span> <span word="air">air</span>, <span word="causing">causing</span> <span word="air">air</span> <span word="pollution">pollution</span>.</p><p> <span word="Scientists">Scientists</span> <span word="are">are</span> <span word="finding">finding</span> <span word="ways">ways</span> <span word="to">to</span> <span word="stop">stop</span> <span word="air">air</span> <span word="pollution">pollution</span> <span word="especially">especially</span> <span word="in">in</span> <span word="big">big</span> <span word="industrial">industrial</span> <span word="areas">areas</span> <span word="and">and</span> <span word="densely">densely</span>-<span word="populated">populated</span> <span word="cities">cities</span>. <span word="They">They</span> <span word="are">are</span> <span word="studying">studying</span> <span word="new">new</span> <span word="ways">ways</span> <span word="of">of</span> <span word="generating">generating</span> <span word="electricity">electricity</span> <span word="that">that</span> <span word="may">may</span> <span word="be">be</span> <span word="less">less</span> <span word="damaging">damaging</span> <span word="to">to</span> <span word="the">the</span> <span word="environment">environment</span>. <span word="In">In</span> <span word="the">the</span> <span word="meantime">meantime</span>, <span word="many">many</span> <span word="power">power</span> <span word="plants">plants</span> <span word="are">are</span> <span word="being">being</span> <span word="modernized">modernized</span> <span word="to">to</span> <span word="give">give</span> <span word="off">off</span> <span word="less">less</span> <span word="polluted">polluted</span> <span word="material">material</span>. <span word="Also">Also</span>, <span word="engineers">engineers</span> <span word="try">try</span> <span word="to">to</span> <span word="design">design</span> <span word="and">and</span> <span word="locate">locate</span> <span word="new">new</span> <span word="power">power</span> <span word="plants">plants</span> <span word="to">to</span> <span word="do">do</span> <span word="minimum">minimum</span> <span word="damage">damage</span> <span word="to">to</span> <span word="the">the</span> <span word="environment">environment</span>.</p><p> <span word="However">However</span>, <span word="it">it</span> <span word="may">may</span> <span word="be">be</span> <span word="that">that</span> <span word="we">we</span> <span word="still">still</span> <span word="have">have</span> <span word="a">a</span> <span word="long">long</span> <span word="way">way</span> <span word="to">to</span> <span word="go">go</span> <span word="before">before</span> <span word="we">we</span> <span word="have">have</span> <span word="a">a</span> <span word="clean">clean</span> <span word="world">world</span>. <span word="Nearly">Nearly</span> <span word="all">all</span> <span word="of">of</span> <span word="the">the</span> <span word="countries">countries</span> <span word="are">are</span> <span word="trying">trying</span> <span word="hard">hard</span> <span word="to">to</span> <span word="prevent">prevent</span> <span word="and">and</span> <span word="control">control</span> <span word="air">air</span> <span word="pollution">pollution</span>. <span word="There">There</span> <span word="indeed">indeed</span> <span word="seems">seems</span> <span word="to">to</span> <span word="be">be</span> <span word="no">no</span> <span word="end">end</span> <span word="to">to</span> <span word="tasks">tasks</span> <span word="that">that</span> <span word="environmentalists">environmentalists</span> <span word="will">will</span> <span word="be">be</span> <span word="required">required</span> <span word="to">to</span> <span word="do">do</span>. <span word="People">People</span> <span word="will">will</span> <span word="continually">continually</span> <span word="find">find</span> <span word="new">new</span> <span word="ways">ways</span> <span word="to">to</span> <span word="control">control</span> <span word="pollution">pollution</span>.</p><p> </p>
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