Now< we have air pollution... what are kinds of poisonous gases that can pollute air??
You cannot write :carbon monoxide,sulfur oxides,CFC's
You can write the gases that I didn't write...

Some chemical agents, called nerve agents or poison gas, can cause death. They may be colorless, odorless, and tasteless. They can cause death rapidly if the victim inhales them or if they are splashed on bare skin. Chemical agents have not been widely used in warfare since World War I ended in 1918. Other chemical agents are not fatal, but they make their victims unable to fight. Blister agents cause huge blisters on the skin. A blister agent called mustard gas caused many casualties during World War I. Other chemical agents can cause temporary blindness or confusion. Gas masks, other protective coverings, and injections of antidotes are used as defenses against chemical agents.

Well, the first gases that come to my mind are those that cause acid rain, that is the nitrogen oxides (NO and NO2)and sulfur oxides (I know you already said the latter one).

Then, you have the lead compounds which were once produced in the engines of vehicles when there was still leaded petrol.

Then you have many dust particles from the chimney of factories, soot, ash, etc. (which are mainly carbon)

I can't think of any more for the time being.