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Il discorso di Obama sul cambiamento climatico

04:21
Climate Change Speech 2009
04:47
Multicultural Britain (Ideas and Emotions)
04:25
Environment
04:38
Environment
05:16
Technology
03:00
L'uragano Sandy
03:10
L'Uragano Sandy
03:21
Sharing economy
03:19
Multiculturalità in Gran Bretagna