Please Stop Leaving Your Car Running

I passed a car that was empty and running as I was going into a coffee shop this morning. Because there were only a couple of people inside, I said "hey, someone left their car running outside, you might want to go turn it off," to which a guy (who was just picking up to go) replied "yeah, I do that on purpose when it's cold." First of all, it's not really cold here; most people don't leave their car running in my now home of Minnesota until it's well below freezing (definitely not at 47°), secondly, your car isn't going to cool down that much in the 5 minutes you are inside, and lastly (and most importantly), the air quality here is already prone to being bad, leaving cars running unnecessarily only serves to make it worse. So, please, just turn your car off when you go inside a store/coffee shop/restaurant unless there's some mechanical reason you truly need to keep it running (like your battery is bad).