The most expensive city in the world for year 2014 is Singapore city followed by Paris, then Osol, then Zurich, then Sidney, then Tokyo. In year 2013, Tokyo was the most expensive world city. .
If you want to be realistic, Detroit. If not, most likely to be danger city
it still is
As of 2010, the most visited city in the world is Paris, France with an annual tourist number averaging 15,200,000 tourists.
IT IS WACO, TEXAS!
Most likely smog. Mexico City has a worse smog problem than Los Angeles ever had.
Smog City - 2012 was released on: USA: 25 October 2012 (Los Angeles, California)
industrial smog
Unfortunately,all the major cities of the world are affected by smog.
The city was covered in a thick blanket of smog, making it difficult to see more than a few feet ahead.
The most important would be the hills surrounding the city, which in turn trap the smog caused by vehicles and polluting industries.
The key component of smog is usually gas from cars and buildings. In Victorian times, people would call smog pea soup because of the thickness of the smog. Smog is especially bad in city areas (such as Paris). Some cities introduce traffic bans when there are high levels of smog in the area.
factories and cars
Most states have exemptions for classic cars from smog regulations since none of them were designed with modern regulations in mind. In California which is typically the most stringent for smog regulations, 1965 Mustangs are exempt from smog checks.
There are a few states that are required to have smog checks. One of these states that has the most smog in the United States is California and it's necessary as smog is very harmful to the environment.
western
The most northern city in the world is Honningsvag, in Norway.