- Manufacturing mass timber [1] 5-over-1s and starting a limited-profit housing association [2] wave in the US.

- Completely circular material lifespans. I'm out of my depth here, but there _must_ be a way to gasify/liquify any type of object and filter its contents through a membrane, the same way desalination plants separate salt (NaCL) and water (H20).

- Replacing first-past-the-post voting with proportional representation.

[1]: https://www.vox.com/energy-and-environment/2020/1/15/2105805... [2]: https://www.iut.nu/wp-content/uploads/2017/03/Limited-Profit...