Hans Hassle speaking at the Sustainability Innovation Summit 2013 2016-02-02 469 × 404 No013 Plantagon and the first vertical skyscraper greenhouse! Share... emailFacebook0TwitterLinkedinReddit0Hans Hassle speaking at the Sustainability Innovation Summit 2013. Picture from Youtube. Share... emailFacebook0TwitterLinkedinReddit0 Share... emailFacebook0TwitterLinkedinReddit0Share... emailFacebook0TwitterLinkedinReddit0
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