WastheLondonOlympicsasuccess？Manypeopleholddifferentopinions．However，onethingiscertain，Londoncouldwinagoldmedalforhostingthe"greenest"Gamesever，BBCNewsreported．PreviousOlympichostshavebeencriticizedf
WastheLondonOlympicsasuccess？Manypeopleholddifferentopinions．However，onethingiscertain，Londoncouldwinagoldmedalforhostingthe"greenest"Gamesever，BBCNewsreported．
PreviousOlympichostshavebeencriticizedfortheenvironmentaldamagetheyhavecausedthroughconstruction，wasteandtransport．ButthingshadtobedifferentinLondonbecausesevenyearsagoitbidfortheOlympicsthroughtheconceptof"aOnePlanetOlympics"．
WhatismostimpressiveisthatLondontheconstructionoftheOlympicParkasanopportunitytocleanuppollutedareas---2milliontonsofpollutedsoilswereremovedand200oldfactorybuildingsweretorndown，accordingtosustainablebusiness．com．Butthat'snotall---99percentofthedebris（废瓦砾）werereusedtobuildtheOlympicPark．Forexample，theOlympicStadium'sroofismadefrom2，5.00tonsofsteeltubesrecycledfromoldgaspipelines．
Aswellasusingrecycledmaterials，allvenues（场馆）werebuiltwithgreenbuildingtechniques．TheOlympicStadiumisthelightestoneeverbuilt，whichminimizedtheamountofsteelandconcreteneeded．Also，thehandballfieldhaslightingpipesontheroofthatreduceelectricityuseby40percent，accordingtosustainablebusiness．com．
TheeffortthatLondonmadetodealwithwastealsodeservespraise．Waterusedfordrinkingandwateringplantswasfromcollectedrainwaterorrecycledwastewater．Inthisway，about30-40percentlesswaterwasusedintotal．Wastefoodpackagewereeitherrecycledorprocessedandturnedintorenewableenergy．
AsoneofthebestconnectedplacesinEurope，Londontriedtosolvetrafficjamsbyencouragingtheuseofpublictransport．Forexample，ithadtrainsdeliverhalfofthebuildingmaterials，insteadofcars，whichgreatlyreducedcarbonemissions（排放）．
Thecleananti-dopingresultalsoaddedtothegreennessoftheGames．TheInternationalOlympicsCommittee（IOC）saidthatthedevicesusedthistimewerethemostaccurateandadvanced．Onlyoneathletetestedpositiveforabanneddrugonthedayofcompeting，whichiswhytheIOCPresident，JacquesRogge，haspraisedanti-dopingeffortsattheLondonGames．
66．TomaketheOlympicParkgreen，London___．
A．recycled2mill