![Howmuchpaperdoyouuseeveryyear?Perhapsyoucan’tanswerthat...]( "Howmuchpaperdoyouuseeveryyear?Perhapsyoucan’tanswerthat...")
- 問題詳情：Howmuchpaperdoyouuseeveryyear?Perhapsyoucan’tanswerthatquestionquickly.In1900theworld’suseofpaperwasaboutonekilogramforeachpersoninayear.Nowsomecountriesuseasmuchas100kilogramsofpaperforeachpersoninayear.Theamountofpaperacountryusesshowshow...
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