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The helix of sustainability - the Carbon cycle ideal for manufacture and use The international recycling symbol - not nature identical.. The helix of sustainability is a concept coined to help the manufacturing industry move to more sustainable practices by mapping its models of raw material use and reuse onto those of nature.
Hilda Taba. Hilda Taba (7 December 1902 in Kooraste, Governorate of Livonia [1] – 6 July 1967 in San Francisco, California) was an architect, [need quotation to verify] a curriculum theorist, a curriculum reformer, and a teacher educator.
The triple helix model of innovation, as theorized by Etzkowitz and Leydesdorff, is based on the interactions between the three following elements and their associated 'initial role': [9] universities engaging in basic research, industries producing commercial goods and governments that are regulating markets. [2]