4:14 Environmental Ethics: Our Moral Obligation to Nature 1:23 Christopher Oscarson: How is food relevant to environmental ethics? 12:42 Environmental Ethics, part 1 4:57 Environmental Ethics: Deep Ecology 4:27 One Earth - Environmental Short Film 12:58 1. Introduction & Outline [Environmental Ethics] 9:24 Animal ethics and environmental ethics 6:22 Environmental Ethics 11:39 Environmental Ethics 4:48 Environmental Ethics: The Land Ethic and Aldo Leopold 11:26 Environmental Ethics, part 2 9:57 Environmental Ethics Introduction 6:03 Environmental Ethics and Philosophy Lecture Part 1: Preservation Ethic