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Alex Steffen a fenntartható jövőről
1,893,615 plays
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Alex Steffen
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TEDGlobal 2005
• July 2005
Read transcript
Alex Steffen a Worldchanging.com alapítója szerint az ökológiai lábnyom csökkentése életbevágóan fontos, főként manapság, amikor a nyugati szokások megjelennek a fejlődő országokban is.
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