OK in that case let me tackle both points (see my previous post)

1) i understand what you're saying about fast food. you're saying that advertising has made fast food so available, and seems so enticing, that it makes it a lot easier for people to become obese (obesity becoming one of the nation's largest (pun intended

) problems). i agree with you, it's a shame that nothing's really being done about that (on a side note, have you watched Super Size Me? if not, i recommend it, it puts things in perspective, also i think it was an awakening call for a lot of people and companies), but you've got to understand where they're coming from. While fast food is a problem, you've got to understand what perspective people are looking at smoking from: while fast food is a danger to society, it's not a physical danger, as is smoking... you've got to sympathize with them.

2) cars, yes, the biggest problem to mankind, and i actually agree with you. since i started college, very often if it's a nice day and the forecast is good, i'll leave an hour earlier, and ride my bike there... there's nothing wrong with walking/bicycling, and college has taught me that. i've driven my car less and less unless it's crucial, or i'm late, or whatever. although think about it: no one's banning smoking OUTSIDE... someone can step outside anywhere and smoke, but cars aren't allowed to be run in-doors (no they're really not, it's illegal), or if they are, it has to be a ventilated area to specification. so while car fumes are damaging the
environment a lot, they're not damaging people as much. people aren't forced to eat, work, or socialize with car fumes floating around, but they are with cigarette smoke, you see what i'm saying?
although i agree that car pollution is a big problem, that should be tackled as hard as cigarette smoking. car pollution's come a long way, since the EPA's introduction of emission standards in the 70s, and then toughening them through the 80s to today, where if you compare and contrast the contaminants a car outputs to a car 50 years ago, you'll be amazed (i remember reading somewhere a long, long time ago that a V8 idling for 10 seconds puts out more pollution damaging the environment than someone smoking 12 boxes of cigarettes, or some crazy number like that. it made it seem that cigarettes damage humans more than they damage the environment) but even so, pollution IS a big problem, that should be tackled in some way... but cars are rooted so deep in society, there's no way they'll ever be removed. you can't remove something that every member in society relies on, from kids all the way to the retired :-/ sad, but true

EDIT: taking automechanics makes you realize just how much pollutant a car puts out. just a LITTLE fine-tuning, and a car can put out levels over twice as high... and we all know that not every car driving down the highway is perfectly tuned :-/