Howmuchpaperdoyouuseeveryyear?Perhapsyoucan’tanswerthat...
问题详情：Howmuchpaperdoyouuseeveryyear?Perhapsyoucan’tanswerthatquestionquickly.In1900theworld’suseofpaperwasaboutonekilogramforeachpersoninayear.Nowsomecountriesuseasmuchas100kilogramsofpaperforeach...