Key Note Speech "Give Nature A Voice" from David de Rothschild, environmental storyteller, founder of MYOO and The Lost Explorer, at fourth bluesign conference in St.Gallen, July 2015 #4bluesign #fourthbluesign conference #bluesignsystem #bluesigntechnologies #bluesign #MYOO #TheLostExplorer #Plastiki #givenatureavoice
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