6P Singer. "Famine, Affluence, and Morality", in L P Pojman ed, Enviromnental Ethics: Readings in Theory and Application, Wadsworth, 2000.
7H Shu, "Global Environment and Internafonal Inequality", International Affairs, 3 (1999) .
8R Guha. "Radical American Environmentalism and Wilderness Preservation: A Third Crifiqul", in Donald VanDeVeer and Christine Pierce eds , Environmental Ethics and Policy Book, Belmont, California, 1994.
9P. Singer, ''Famine, Affluence, and Morality'', in L. P.Pojman ed, Environmental Ethics: Readings in Theory and Application, Wadsworth, 2000.
10H.Shu, ''Global Environment and International Inequality'', Intrnational Affairs, 3 (1999).