Originally Posted by Zeid
All big cities are polluted, Phoenix is actually one of the least polluted cities I've been to of this size at least. California has some major smog problems, even if you're in the coastal regions unless you're more than 100 miles outside the cities. Also right now the humidity in Los Angeles is 61%, in Phoenix it is 19%.
It's also October
LA is known for it's horrible smog, but in reality they usually have an ocean breeze that blows it away. And it blows it right into the grand canyon and PHX. http://articles.baltimoresun.com/199...on-researchers