Originally posted on CBS San Francisco:

These days, your food may accrue more frequent flyer miles than you do. The distance food travels from farm to refrigerator can be as much as 2,000 miles and can encompass a variety of travel modes, from cargo freighters to trucks or airplanes. Many people find themselves hitching their appetites and hopes for a greener planet to the local food movement, assuming locally-farmed produce, meat and fish are fresher and have smaller carbon footprints than foods shipped from far away. But is this really the case? Locavores may think so, but the greening of food miles is only a small piece of the local food movement story.

The Myth of the Carbon Footprint

While there is no definitive consensus on what constitutes locally grown, locavores from San Francisco to South Hampton typically cite the 100-mile rule, thinking that anything transported from farther away automatically creates a larger carbon footprint, more…

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