What is the difference between the type of smog experienced by cities in the eastern united states and that found in southern california?

Smog formation and entrapment over Los Angeles. smog, community-wide polluted air. Sulfurous smog, which is also called “London smog,” results from a high concentration of sulfur oxides in the air and is caused by the use of sulfur-bearing fossil fuels, particularly coal.

that is wrong, its not thymus.