Sorry in advance for the loooong post 
And how would you propose that we do that? Either one? For instance, I live in Alaska, one of the wealthier states. But we have the suckiest public transport in the US.
We also have miles and miles of wilderness between populated areas, even in the largest city. The Municipality of Anchorage is about 70 miles N/S (from Girdwood, 40 miles south of Anchorage proper to Eklutna about 15-20 miles north of Anchorage proper).
I live on what’s called “Hillside”. The nearest bus stop is 5 miles away. So what does a person do? Walk when it’s 20 below? Spend 5 or 6 hours of their day commuting by bus?
This might be fine and dandy if one lived in a city with the population (and subsequent taxes) to help subsidize a good public transportation system (one of the best I’ve seen is HI’s, of course I’m guessing tourists probably pay for a lot of that).
A hell of a lot of Americans work 60 and 70 hour weeks, and have kids (with all their gear) to transport to and from daycare, work equipment (perhaps like me, I teach dance and bring my own stereo, wireless mic and music) and so on.
How does a person transport kids and large workgear by bike? And in the case of a person having many more places than just work and home, and to the market once a week, how are they supposed to get that done in a reasonably timely manner by bike or public transportation?
It’s not as if we can (and believe me, I bitch to Anchorage’s pathetic “People Mover” bus authority about their totally useless system all the time), just simply walk down to city hall and say “you know? We need to have improved public transit,” and have them actually respond with such.
As I mentioned earlier, the goverment spends a HELL of a lot more money on subsidies to foods we don’t need (corn and corn products, and the meat fed by corn and corn products) than it does on fruits and vegetables.
The Secretary of Health even admitted that perhaps the lobbyists for those sections of agriculture weren’t as effective as those for corn.
Bottom line, IMHO, does the government even remotely listen to Joe Citizen about his wants and needs healthwise?
What would it take for us to GET more subsidies to fruit and vegetable farmers?
To get completely effective public transportation and communities designed for foot, rather than vehicular, traffic?
To get companies, (particularly for employees with long road commuites) to allow for “exercise breaks” and for them to even provide a space for it?
We, the average citizen don’t seem to have the power to GET these changes to come about.
Even if we were to start and be successful, it would be many years before such programs were designed, put into effect and the public is able to use them.
What effective, inexpensive (TIME too!), and available NOW tools can we use?
As I’ve always said, proper education. The useless mantra “eat less, exercise more” is NOT "education.
A three pronged approach, with not the least of which being the emotional aspect, (if it truly WAS just the “party in your mouth” thing, do you REALLY think 2/3s of this large a population would have this problem?). The other two would be diet and exercise.
I’m talking about teaching people that “eating less” does NOT mean starvation. Yes, many obese people are so uneducated about food and their own bodies that they believe that it’s an “either/or” situation, that is that they can either eat “yummy” foods, or that they have to live a bleak existance eating rabbit food for the rest of their lives.
Ditto exercise. Too many people think that, in order to lose (yes LOSE, not loose!! argh), weight that they have to spend hours a day doing miserable and boring exercises sweating their butts off and feeling as if their about to cough up a lung.
A MUCH more effective, and can be had NOW, method of steering people away from obesity is education in these three areas.