Welcome to Using English.
Mist and fog are naturally occurring. Fog is more dense than mist. I'm sure there are scientific differences too, but I do not know what they are.
Haze can be from a natural phenomenon (like mist) or from pollution.
Smog is the result of pollution and probably the word you want.
Please remember that the pronoun "I" is always capitalized and that you should put a space AFTER your punctuation mark, not before it.
Student or Learner