Not every community can be pro-all-natural, but Portland, OR, is. This prevailing attitude of pro-nature and anti-technology here very much favors low emissions. During rush hour you can find your car surrounded by bicycles. because bicycles and cars share the road.
I like to bike, but I don't like to bike with cars, and so I don't bike that much.
When I moved to Portland two years ago I could tell the community was serious about green space. The TRIMET transportation network makes it possible to commute long distances via, rail, bus and trolley car.
I've been pondering a bicycle highway system. If there was funding I think it might be considered. Basically the design uses current lamp and sign post construction techniques to create a raise system of tubes that runs above and parallel to roadways. The tubes would be paved with slip resistant material, and covered in mesh to allow light, dissipate heat and repel rain and snow. They would have subway station-esque pull-offs and fast and slow lanes.
As far as the idea of having city bikes that anyone can use. That has been done several times.
As far as joining the UN I'm thinking that many in Portland wouldn't have any problem with that. Some may actually be looking forward to it.