Onereactiontoalltheconcernabouttropicaldeforestation(砍伐森林)isablankstarethatasksthequestion"SinceIdon'tlivetherewhatdoesithavetodowithme?"Theansweristhatyourwayofl
Onereactiontoalltheconcernabouttropicaldeforestation(砍伐森林)isablankstarethatasksthequestion"SinceIdon'tlivetherewhatdoesithavetodowithme?"
Theansweristhatyourwayoflifewhereveryouliveintheworldistiedtothetropics(热带地区)inmanyways.Ifyouliveinahousewashyourhaireatfruitsandvegetablesdrinksodaordriveacaryoucanbecertainthatyouareaffectedbythelossoftropicalforests.
Biologicallywearelosingtherichestregionsonearthwheneachminuteapieceoftropicalforestthesizeoftencityblocksdisappears.Asmanyasfivemillionspeciesofplantsanimalsandinsects(40to50percentofalllivingthings)livethereandarebeinglostfasterthantheycanbefoundanddescribed.Theirlossisimmeasurable.
Takerubberforexample.Formanyusesonlynaturalrubberfromtreeswilldo.Syntheticsarenotgoodenough.Todayoverhalftheworld'scommercialrubberisproducedinMalaysiaandIndonesiawhiletheAmazon'srubberindustryproducesmuchoftheworld'sfourmilliontons.Andrubberisanimportantmaterialinmakingglovesballoonsfootwearandmanysportinggoods.Thousandsofothertropicalplantsarevaluablefortheirindustrialuse.
Manyscientistsstronglybelievethatdeforestationcontributestothegreenhouseeffect–orheatingoftheearthfromincreasedcarbondioxideintheatmosphere.Aswedestroyforestswelosetheirabilitytochangecarbondioxideintooxygen.
Carbondioxidelevelscoulddoublewithinthenexthalf-centurywarmingtheearthbyasmuchas4.5degrees.TheresultApartialmelt-downofpolaricecapsraisingsealevelsasmuchas24feet;even15feetcouldthreatenanyonelivingwithin35milesofthecoast.Unbelievable?Maybe.Butscientistswarnthatbythetimewerealizethesevereeffectsoftropicaldeforestationitwillbe20yearstoolate.
Cantropicaldeforestationaffectoureverydaylives?Nowyoushouldhavegottheanswer.
68.Theunderlinedword"synthetics"inParagraph4probablymeans .
A.naturalrubber B.tropicalmaterials
C.man-madematerial D.commercialrubber
69.Inthelastparagraphtheauthortriesto .