I celebrated when cigarettes were banned in restaurants

That's not quite what positive reinforcement is but im not sciency enough to understand it either lol
I'll paste Wikipedias explanation:

In the behavioral sciences, the terms "positive" and "negative" refer when used in their strict technical sense to the nature of the action performed by the conditioner rather than to the responding operant's evaluation of that action and its consequence(s). "Positive" actions are those that add a factor, be it pleasant or unpleasant, to the environment, whereas "negative" actions are those that remove or withhold from the environment a factor of either type. In turn, the strict sense of "reinforcement" refers only to reward-based conditioning; the introduction of unpleasant factors and the removal or withholding of pleasant factors are instead referred to as "punishment", which when used in its strict sense thus stands in contradistinction to "reinforcement". Thus, "positive reinforcement" refers to the addition of a pleasant factor, "positive punishment" refers to the addition of an unpleasant factor, "negative reinforcement" refers to the removal or withholding of an unpleasant factor, and "negative punishment" refers to the removal or withholding of a pleasant factor.

This usage is at odds with some non-technical usages of the four term combinations, especially in the case of the term "negative reinforcement", which is often used to denote what technical parlance would describe as "positive punishment" in that the non-technical usage interprets "reinforcement" as subsuming both reward and punishment and "negative" as referring to the responding operant's evaluation of the factor being introduced. By contrast, technical parlance would use the term "negative reinforcement" to describe encouragement of a given behavior by creating a scenario in which an unpleasant factor is or will be present but engaging in the behavior results in either escaping from that factor or preventing its occurrence, as in Martin Seligman’s experiment involving dogs learning to avoid electric shocks.

(These paragraphs are one after the other but I can't figure out proper formatting)

Positive punishment is different from positive reinforcement. Shame is a punishment

Punishment for bad behaviour is negative reinforcement.

negative reinforcement is what punishment for undesired behavior is called.

positive reinforcement is rewarding when the desired behavior is exhibited.

edit: negative reinforcement requires forever conditioning and develops sick and twisted conditioners eventually. positive reinforcement takes longer to work but it doesn't require forever conditioning. And rarely causes revolutionary acts.

Positive reinforcement tends to work best, but people should never underestimate the power of "you smell like an old leather ashtray"

My eldest brother had asthma, so my parents were generally careful not to smoke around us. They had a dedicated room in the house for smoking so that the rest of the house would get less contaminated. Fortunately, this meant that they didn't generally smoke in the car while driving us around. Also, my dad worked and/or commuted thirteen hours a day so I was mostly around my mom, who smoked a lot less.

The car borrowing I mentioned was years after my brother had moved across the country when my dad drove his car almost exclusively alone, so at least no one else (who wasn't borrowing the car) was engulfed.

I'm sorry you had to suffer through that.