Philip Greenspun has a great point here.
I think he’s right. I also have probably written on the blog before that CSAs that mean an extra drive each week needs to be considered (since the farm is probably not right on your commute to work or on the way to the grocery store you’d be driving to anyway). If you drive a 20MPG car, are those nice local bio-dynamic vegetables really worth the 1/2 gallon of gas you just burned driving 5 milesx2 to the farm? Visualize 1/2 gallon of gas for a second. It’s not!