Good points about tabacco, liquor and speed limits. I'd have a hard time imagining a world without liquor, but it does cause many deaths.
I'm also proud to say that in my city cigarettes are almost completely banned. You cannot smoke cigarettes in any indoor public place, not even a bar. And I certainly wouldn'tbe surprised if they become like any other illegal drug.
Speed limits don't need to be lowered, that shouldn't be a priority. It should be getting more fuel efficient cars on the road, and more alternate sources of travel.
http://www.americansforfuelefficientcars.org/ads/default.htm