As a car person, I'd love to see some kind of ordinance in my city of "any single-story paid parking lot is required to add a rooftop park that covers 90% of the area of the lot". I'm sure it adds to their $0/yr maintenance, but it would benefit everyone else.

This is a straw man and does not feel particularly valid. I've never seen trees planted _in the streets_ and have always seen them planted along sidewalks. I don't believe trees steal parking spaces. Also, even with A/C, extreme temperatures can be a significant pain. Your car still gets scorching hot, and you waste a lot of energy cooling it down. (and further, it takes time for the A/C to actually start working.

You've never seen trees in the street? They're fairly common here in Dublin, either along the midline or separating cars from cyclists.

You are talking past each other. They mean planted in the roadway.