We would need rid out dependence on oil, it's polutive, and destructive to the environment. too many people in america just drive for fun, instead of walking a mile they would ride their car instead. some are even crazy enough to drive their car just across the neighborhood, that's right just one block away! i think the real reason for obesity is lack of exercise in america and second would be fatty food due to growth hormones. we're fuked as a species, I mean royally. no one's willing to make a change because it would be inconvenient for them. if you had a choice of eating and sleeping 24hrs a day with little work or work your ass off for better health, how many would choose the latter one?