Who knew cauliflower were such globe-trotters?  Or that jet-setting tomatoes racked up frequent-flier miles? But it's true: North American produce typically travels a minimum of 1,500 miles. Grapes can clock 2,143 miles cruising from vineyards in Napa Valley to supermarket aisles in Chicago, gobbling up barrels of crude oil and spewing pollutants and greenhouse-gas emissions in their wake. By buying your produce locally, whether it's through the farmers' market or a community-assisted agriculture program, you can reduce your "food miles," otherwise known as the distance your food has to travel to get from the farm to your plate. Now that's fresh.