Given the recent and well-deserved public attention to issues surrounding anthropogenic global climate change it should be obvious that teaching environmental ethics is one way professional philosophers can make a valuable social contribution. At the same time, environmental ethics is a relatively new branch of moral thought, one that has seen significant development and diversification. The urgent need to teach environmental ethics and the rapid development of ideas in the field combine to make it imperative that, on occasion, those who teach environmental ethics revisit ideas about how and what they should be teaching.