…two Carnegie Mellon researchers recently broke down
the carbon footprint of foods, and their findings were a bit
surprising. 83 percent of emissions came from the growth and production
of the food itself. Only 11 percent came from transportation, and even
then, only 4 percent came from the transportation between grower and
seller (which is the part that eating local helps cut).
In other words, when it comes to food the greenest things you can do, if that is your standard, is to eat less meat and have fewer kids.