I'd love to see some "combustion-free" zones in cities: neighbourhoods without gas heating or stoves, internal combustion vehicles not allowed on the streets, as walkable as possible so cars aren't really needed anyways. Could start small (one square block) and expand from there.
Both “net zero” and “net positive” are misleading. Both often greenwash. Let’s speak plainly: Stop burning anything in buildings. Stop providing parking at buildings. Use less less land and far less stuff to construct buildings, and make all daily needs walkable.