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2. For World Commission on Environment and Development, Our Common Future;Brundtland,1987
3. Sustainability—the next chapter;Batterham;Chem. Eng. Sci.,2006
4. United Nations Conference on Environment and Development (UNCED), Rio de Janeiro, June 3–14, 1992.
5. Green engineering: environmentally conscious design of chemical processes and products;Allen;AIChE J.,2001