Visions of Solarpunk

OK, maybe some scooters and skateboards too. Electric versions of vehicles are fine, but generally having human transportation that doesn't need lots of real estate for parking or pollute the air

Rooftops, vertical surfaces. Get that greenery everywhere for both its mental health benefits and reducing carbon dioxide.

The raw material of whatever you're disposing of is available to feed a 3D printer which will produce what either you or the next person needs.

Offices convert to living spaces. Spacious apartments convert to denser residences for families and back again. If 3D printing can make walls, furniture etc accessible and modular, it's easier to invest in urban densification, as a building can adapt to changing needs and demographics

I hate golf but imagine an 18-hole course in the space of a single hole's course. When you finish a hole, the topography changes to be different. At the end of your game, the space turns into a soccer pitch or a playground or an outdoor concert venue.

This one scared me at first as I had nightmares of air traffic collisions with various Amazon drones bumping into one another and dropping their boxes on our heads. Still if it could be done intelligently (networks, smart traffic control) and they work on the noise factor, delivery trucks wouldn't be clogging up our transportation corridors.

Humans generate energy all the time. A park bench uses the body heat of someone sitting on it to deliver energy to the grid (or power some nearby technology). A sidewalk captures the vibrational energy of pedestrians. Smart steered solar panels recapture energy from light pollution. Even a hot sidewalk on a summer day could provide heat to be converted for other use later.

Apparently, the city of Toronto wants to ban cats from being outdoors without a leash to protect songbird populations, while simultaneously banning the feeding of pigeons (which are supposedly overpopulated). Rather than banning things, I imagine a drone that could monitor the cats and pigeon feeders and scare away the birds before harm is done.

There's a nice creek behind my house, but I have to remind myself that it's fed by the street sewer run-off so it would have chemicals like motor oil or fertilizer in it. I wish all water use could have the undesirable chemicals removed and repurposed so we'd know that ponds and creeks are safe for life forms.

Your produce is local, but also as exotic as you like. Mangoes in Alaska for example.