In addition to fluoride, water supplies should be dosed with small amounts of lithium. Maybe LSD, too.
Incel bounties: Anyone who has trouble getting laid can check into a facility where they are assigned a bounty equal to a set rate times the days they’ve spent in the facility. They can leave any time, but the clock restarts if they come back. Volunteers may show up and offer to have sex with a participant. If the participant agrees and the deed is done, the bounty gets split between the volunteer and the participant.
Hard rationing of greenhouse gas emissions: every year everyone gets issued an equal amount of GHG vouchers that, in total, represent a safe amount of GHGs that can be emitted that year. Fossil fuel companies then need to buy these vouchers on the market and turn them into the government in order to get permission to extract the representative amount of fossil fuels. Doing so without permission would carry a severe penalty. This concept could be applied to water supplies, fisheries, and other resources as well.
Imputed rent as taxable income instead of flat property or wealth taxes.
No fares for urban public transit. Instead, a special property tax should be applied to real estate inversely proportional to its walking distance from transit stops.
Reintroduce wolves to suburban areas to keep the deer under control.
Electric airships instead of fossil fuel powered passenger jets.
Nuclear power plants within or adjacent to urban centers, especially in colder climate regions.
Gray water recovery built into homes and municipal water systems.