Howdy Laura, interesting post. I don't know that we should ban all bars, but perhaps a breathalizer test when patrons leave the bar should be in order. It only takes a few seconds. If you're over the limit, you don't leave until you are under. What do you think? Fortunately, someone's perfume that I rarely smell, does not give me cancer. Sorry that you are allergic to it. If someone takes sugar with their coffee, that does not give me cancer either. If their sugar causes weight problems for them, that doesn't give me cancer either...or cause me to choke or cause my clothing to smell or kills my sense of taste and smell. The emissions from today's cars are indeed, a problem. But thanks to stringent legislation, they do not emit anywhere near the pollution that older models do. And the emission standards keep getting tougher and tougher. As a partial offset, unfortunately we are indeed driving more miles today than yesterday. State and federal governments monitor the air in all 50 states. If emission criteria is exceeded, then the feds issue a mandate for the states to reduce tailpipe emissions and take other preventative measures. Those zones that exceed the allowable standards are known as areas of "non-attainment", meaning they do not attain the federal and state requirements for clean air. Within these areas, measures are required to be taken to minimize pollution and return the air quality to acceptable levels, under established time frames. It's the law. It's called the "Clean Air Act" of 1970...along with updates. In addition, there are more and more "hybrid" vehicles out there...much less tailpipe exhaust. My point is that there are many things being done to minimize tailpipe emissions. We need more of that kind of thinking behind the push to abolish smoking in ALL public places...and eventually, abolish it altogether, period. Yes, I do know how much emissions come from the tailpipe of a car. HC, NOx, CO, CO2, VOC, lead. But much less today than yesterday and much less tomorrow than today. Vehicles are a NEED, but I don't know that I would call them "habit forming" like cigarettes.