japanisexploringthefeasibilityofforgingtheolympic 2020 medalsusingpreciousmetalssalvagedfromelectronicwaste .在日本，用于电子垃圾再利用的membersofjapansolympicorganisingcommitteetabledtheideatogovernmentofficialsandcompaniesearlierthisyear， localmediareportssaage olympichostcitieshavetraditionallyobtainedthemetalfromminingfirms .奥林匹克主办城市指矿物公司销售金属。But Japan，whichlacksitsownmineralresources，iskeentotakethemeofasustainablefutureastepfurther .但是，日本作为矿产资源不足的国家，更theinternationalolympiccommittee (IOC ) hasdevelopedstrictcriteriafortheworldsgreatestsportingevent是andthisextendstohowthemede 其中包括制作奖牌的方法。The Rio Olympics，for example，usedgoldthatwasextractedwithouttheuseofmercuryandathirdofthesilverandbronzeusedcamefromrecycce。
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