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Consumers also perceive that purchasing local is a green or sustainable practice (Hartman Group, 2008). About one-third (35%) of consumers report that they buy local because of the high environmental impact of transportation (Food Marketing Institute, 2009). Comparisons of transportation energy cost, however, indicate that transportation by personal truck has a significantly higher per ton energy cost than transportation by highway truck, railroad, or ship (Thompson, 2009). One mile by personal car is equivalent to 740 miles by highway truck, 2,400 miles by railroad, and 3,800 miles by ship (See Figure 2). Since local may mean anywhere from within 50 miles or within the state, local transportation costs could be substantial. If the local climate requires higher costs in production, such as use of a greenhouse, a locally grown product could be more costly from an energy perspective than a product transported efficiently from another location.
Consumers also perceive that purchasing local is a green or sustainable practice (Hartman Group, 2008). About one-third (35%) of consumers report that they buy local because of the high environmental impact of transportation (Food Marketing Institute, 2009). Comparisons of transportation energy cost, however, indicate that transportation by personal truck has a significantly higher per ton energy cost than transportation by highway truck, railroad, or ship (Thompson, 2009). One mile by personal car is equivalent to 740 miles by highway truck, 2,400 miles by railroad, and 3,800 miles by ship (See Figure 2). Since local may mean anywhere from within 50 miles or within the state, local transportation costs could be substantial. If the local climate requires higher costs in production, such as use of a greenhouse, a locally grown product could be more costly from an energy perspective than a product transported efficiently from another location.
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