That indicates to me that we need higher density and less sprawl. And before someone says well how do we force people to stay close to the center, check out Portland, OR:
http://en.wikipedia.org/wiki/Metro_%28Oregon_regional_govern...
http://en.wikipedia.org/wiki/Metro_%28Oregon_regional_govern...
High productivity farm land is being destroyed by development at an alarming rate. The US is steadily becoming a food importer in category after category, where once we exported. This puts further pressure on our already abysmal trade deficit. This is also a national security issue.