贵州省贵阳市花溪二中八年级英语下册《Unit 4 Lesson 1》课件3 人教新目标版.ppt

lessononepopulationproblems wheredowelive isitbeautiful doyouloveit whatdopeoplealwayscallitinsteadoftheearth ifshehasproblems wouldyouliketohelpher theworldisfacedwithmanyproblems governmentsshouldsolve populationgrowth theproblemofovercrowdinginmanycities theagingproblems inafrica inasia ineurope futureproblems readthefirstparagraphandfillintheblanks theworldpopulationis very inthelast40years theworldpopulationhas bytheyear2200 itwillbeabout billion ourcitieswillbemuch therewillbemore andmore wewillneedmore andother therefore wewillhave inthefuture sowemustchangethewayweuse andnatural now bigger factories roads water seriousproblems growing fast doubled 10 naturalresources energy resources secondparagraphlistenandfillinthemissingwords ofthisispaperthatwecanuseagain averagefamilyineuropeoramericathrowsawayover tonofrubbish year butwecanrecycle ofit ifwerecyclethings wecansave and half an one each much reuse morethan money energy resources thirdparagraphlistenandthenanswerthequestions a whatwillexist 存在 forhundredsofyears b whatpollutestheair thelandandthewater c whatcanwedotoreduce 减少 pollution plasticsandchemicals wemuststopusingmaterialslikeplasticsandchemicals notdisappear plasticsandchemicals fourthparagraphfillintheblanksusingthewordsinthebrown thewaysto usedup available less fewercoalandminerals forexample willbe someday otherresourcestakealongtimetogrow suchastrees ortheymaynotalwaysbe suchaswater wemustlearntouse energyand resources wealsohavetofindotherwaystomakeenergy wecanfind usethesun thewindandthesea usedup fewer less available thewaysto produce useable fastpopulationgrowth changethewayweuseenergyandnaturalresources wastethingswecanuseagain recycle alotofrubbishcannotberecycled pollutetheair thelandandthewater willbeusedupsomedayormaynotalwaysbeavailable uselessenergyandresourcesorfindotherwaystomakeenergy pairwork readthematerialandcompletethetable groupdiscussion formagroupoffouranddiscussthemainideaofeachparagraph youmayfindithelpfultousethefirstandlastsentencesofeachgroup hint themainideaofeachparagraph 1234 a plasticsandchemicalscannotbereused instead theypollutetheair thelandandthesea sowemuststopusingthem b becausetheworldpopulationisgrowing wewillfaceseriousproblems so wemustfindoutsolutions c manyofthenaturalresourcescannotberenewed sowemustfindnewwaystomakeenergy d peoplethrowawaymillionsoftonsofrubbisheveryyear butwecanusemuchofitag