It's almost taken for granted that chosing locally grown produce is the right thing to do if you care about the environment, but do people buy it??

Here's something to think about on your next trip to the farmer's market.
Are the virtues of buying local, really all their cracked up to be?
No ... according to our next guest.
Pierre Desrochers is an associate professor of geography at the University of Toronto.
He's just written a book called The Locavore's Dilemma: In Praise of the Ten-thousand Mile Diet.
Listen (runs 6:51)