





They have pre-empted a lot of that trouble with really high emissions standards. All cars have to be tested before licensing.
What you're seeing here is a typically crystal-clear day in Tucson - high up. Nearer the ground, you see a thick haze of pollen and dust that the winds have kicked up and spread skyward. If "smog" is a combination of "smoke" and "fog", what would you call a combination of pollen and dust - "pust"? Or fog-like pollen clouds - "pog"?
