Minimally if at all and locally, not worldwide. Example: LA smog is not found in NYC, Brussels or Brisbane. Beijing pollution is not found in Dusseldorf, Greensboro or Murmansk.
LA smog is weather
Measurable change in the average temperature over 100 years is climate change.
Determining the operative force producing a change to be man will be difficult. We have no human reason for the desertification of North Africa. We have no manmade causation for the desertification of Uzbekistan and kazakhstan that once had very large human cities and populations.
What we have is liars, cheaters and swindlers and great unwashed masses of ignorant and gullible people