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2. United Nations Environment Programme, Greening the Economy Through Life Cycle Thinking: Ten Years of the UNEP/SETAC Life Cycle Initiative (2012)
3. D.W. Orr, Ecological Literacy: Education and the Transition to a Postmodern World (SUNY Press, Albany, 1992)
4. F. Capra, Speaking nature’s language: principles for sustainability, in Ecological Literacy: Educating Our Children for a Sustainable World (2005)
5. F. Capra, P.L. Luisi, The Systems View of Life: A Unifying Vision (Cambridge University Press, Cambridge, 2016)