Not quite correct. The 2020 image should have a car completely covered in a dust of green pollen because city planners only planted male trees for decades because female trees would produce fruit or seed and be a “nuisance” and/or create trash/animal bait etc…

But if they only planted female trees, they would never get fertilized, so they wouldn’t produce fruit anyway… Or pollen.

Worst case scenario, they would produce fruit, and cities would still smell bad and have rodent problems. But without the allergies.