chapotraphouse

I'd make all detached single-family homes near an urban center illegal and start replacing them all with a combination of low-rise attached units for families, and apartment complexes for people without kids (notionally, I'm fine with some intermixing). Make sure that there are services and amenities within walking distance of all newly-densified housing, and run bus service and light rail everywhere. Then I'd ban private vehicles anywhere within view of a skyscraper. You will live in a pleasant, walkable community with greenspace and accessible services, or you will be sent to the reeducation camps.

Also, big bronze statue in a park. Big enough to provide ample shade to park goers in the summer.

I'd want to breed sapience into cows and have them join us in society.

In addition to massive expansion of the north and south American rail systems my megaproject would be a rail link across the Bering Strait to connect AfroEurasia to North and South America. My dream is being able to travel from Cape Horn to Cape Town almost entirely by rail

Lithium in the water supply makes a dent in the suicide numbers, but it's been a long time since I was crazy enough to put real thought into it.

Make rokos basilisk real but exclusively target dipshit techbros. And genetically modifying humanity so I can eat all the unhealthy tasty food I want without getting some kind of cancer or turning into a blimp, or anything else really.

We’re bringing back Roman bath houses and including spots to nap in public there in case you have like an hour and a half gap between things you have to do but it’s too far to go home. Really just more public space investment

Tubes!

• All mail (letters and small items) to be delivered by a pneumatic tube systems. Civilian tubes are free. Business post cost increases considerably so only important things are sent. I don't want fifteen tubes landing a day with junk mail in them. Parcels to be delivered by traditional post people, but better compensated and with less punishing rounds thanks to lower amounts of corporate mail.

• New tunnels beneath water to be made of indestructable glass like an aquarium. Other policies will have reduced pollution and helped rewild the rivers and oceans for more to see. More underwater tube tunnels to be built to reduce reliance on planes and boats.

• Vertical mega-gardens/farms in transparent towers. Tops extend upward to save space and capture sunlight, bottoms extend downward for natural geothermal warming to reduce energy consumption. Different ambient temperatures based on geothermal depth would allow for growing plants and produce native to different climates. No more shipping flowers or fruit across the planet! More tall green towers! See argriculture happen in real time!

your proposals are all quite nice but none of them would knowingly ecocide half a continent & cost/generate more power than has ever been used by humanity for the simple goal of refilling the LA River

oh yeah, its NAWAPA TIME

Antarctica colony. Big ass bronze statue staring out over the ocean north like the Colossus of Rhodes

Massive radio telescopes built into the far side of the Moon.