what is the smoggiest city in the united states
Air pollution in the United States Los Angeles has the most contaminated air in the country. With a population of roughly over 10 million, the Los Angeles area is a large basin with the Pacific Ocean to the west, and several mountain ranges with 11,000-foot peaks to the east and south. Diesel engines, ports, motor vehicles, and industries are main sources of air pollution in Los Angeles. Frequent sunny days and low rainfall contribute to ozone formation, as well as high levels of fine particles and dust.[72] The strong relationship between AQI and ozone levels may be found on air pollution maps.[73]
List of smoking bans in the United States As further detailed in this list, smoking laws vary widely throughout the United States. Some places in the United States do not generally regulate smoking at all, some ban smoking in certain areas and not others, and some ban smoking nearly everywhere, even in outdoor areas (no state bans smoking in all public outdoor areas, but some local jurisdictions do). As of July 1, 2017, according to the American Nonsmokers' Rights Foundation, 81.5% of the U.S. population lives under a ban on smoking in "workplaces, and/or restaurants, and/or bars, by either a state, commonwealth, or local law",[1] and 58.6% live under a ban covering all workplaces and restaurants and bars.[2] A smoking ban (either state or local) has been enacted covering all bars and restaurants in each of the 60 most populated cities in the United States except these 12: Atlanta, Fort Worth, Jacksonville, Memphis, Miami, Las Vegas, Nashville, Oklahoma City, Philadelphia, Tampa, Tulsa, and Virginia Beach.[3][4]