This equal a land area double the size of Delaware. This reduces quality of life by increasing vehicular traffic, adding heavy equipment, noise, and significantly impacting both air quality and ground water quality and quantity.

“Food imports have been steadily rising for four years. There were a few months in 2004 when the United States imported more food than it exported. Our food stores are now stocked with fruits and vegetables year-round with the origin and source changing with the seasons. That’s why horticultural products are the largest component of agricultural imports.” The steady increase in agricultural imports is a trend that Infanger said will not go away. Consumers expect a wide variety of foods from around the globe. He said exports will vary with production levels, global competition and the value of the dollar.”
http://www.ca.uky.edu/agc/news/2005/Feb/imports.htm

It appears that part of our problem is that Americans rely on imported foods rather than eating locally grown fresh fruits and vegetables when they are in season.