哲學大綱problems are concerned with the nature of existence, knowledge, morality, reason and human purpose." A.C. Grayling, Philosophy 1: A Guide through the Subject
環境哲學 (原始内容存档于2018-10-17) (英语). Vogel, Steven. Environmental Philosophy after the End of Nature. Environmental Ethics. 2002, 24 (1): 23–39 [2018-10-17]. ISSN 0163-4275