Environmentalism is the study of the relationship between living organisms (including human beings) and natural environments, usually with the aim of preserving natural environments and renewable resources. Environmentalism is now a multifaceted, multi-disciplinary field, extending widely into both theory and practice. Environmental philosophy has drawn on many traditions and subfields within philosophy, including: ethics, social philosophy, continental philosophy, aesthetics, and feminism. Each of these areas refers basic questions about our relation to the environment to fundamental philosophical viewpoints.