Yoram Bauman is also an environmental economist.  With this hat on, in the NYT, he says:

Learning about the shortcomings as well as the successes of free markets is at the heart of any good economics education, and students — especially those who are not destined to major in the field — deserve to hear both sides of the story.

Which reminds me of my plan to put in more stuff about common property resources, public goods and externalities into my MBA course next quarter…