"The strong sustainability paradigm, thus allows for nonutilitarian values but remain anthropocentric. The 'fairness' in question is fairness between people; and the bioethics (very strong sustainability) paradigm, which seeks, in one version, to support a steadystate (minimum resource take) economy, as well as to encompass non-instrumental values in nature and consequently notions of rights and In practice there is a spectrum of perspectives which overlap each other interests for non-human components of the biosphere (Naess, 1973)." (in: Sustainable economic development: economic and ethical principles by R.K. Turner and D.W. Pearce)