Theyounggreenconsumerguide
Thisbooksaysthatourworldisindanger.Itisvitalthatwedosomethingtosavetheearth.Firstofall,whatarethethreatstoourenvironment?
Thegreenhouseeffect
Thewritersaskusto"imaginetheearthinsideakindofgreenhousewiththeatmospherearounditactingliketheglass,lettingsunlightinwhilekeepingmuchofthewarmthfromgettingout.Theatmosphereisessentialtoalllivingthings.Withoutit,theearthwouldbeascoldandlifelessasthesurfaceofthemoon."
"Thetroubleisthatouratmosphereischangingbecausewearepollutingitwithchemicals-intheformofgases-anditiskeepingintoomuchheat!
Thesegases,mainlycarbondioxide(CO2),areproducedbyburningfuelssuchaspetrol.TheGreenhouseEffectmaycausetheleveloftheseatoriseanddrowncitiesandevenwholecountries.
Damagetotheozonelayer
Thewriterstellusthat"ozoneisagaswhichoccurs20-50kmabovetheground.Itformsanessentialprotectivelayeraroundtheearth.Withoutit,thesunwouldburnusup."
WearemakingholesintheozonelayermainlybyusingchemicalscalledCFCs.Weusetheseinfridgesandspraycans,andtomakeplasticitemssuchasfastfoodboxes.
Destructionoftherainforests
TheburningandcuttingdownoftreesismakingtheGreenhouseEffectworsebecausetreestakeinCO2.Italsocauseserosionofthesoilandflooding,aswellasdestroyingthepeopleandanimalswhomakethefreststheirhome.
Badhabits
Manyofourhabitscausepollution,especiallyourhabitofusingthingsonceandthenthrowingthemaway.Thiscreatesmassivemountainsofrubbish.Wedonotknowwhattodowiththerubbishanditpollutesourlandandsea.Forexample,sevenbilliondrinkcansarethrownawayinBritaineachyear.Thatisenoughtoreachfromtheearthtothemoon.
Howcanwesavetheearth?
Thebook'sideaisthatweshouldbecomegreenconsumers.Thatis,weshouldonlybuyandusethingsthatdonotdamagetheenvironment.Andweshouldbuyonlyfromcompainesthatdonotdamagetheenvironmenteither.
打得我手都酸了,就可怜一下吧.这篇课文我们刚刚学完,还不算太长,给你打了那么多,一定要用心看啊!
