SUVs and similar sized things, except where needed for business.

Gas (petrol) for less than US$5.00 per US gallon in the US. (Heck, it might disappear entirely.)

Plastic throwaway bottles, etc. -- they'll be too valuable when recycled.

Neocons in the US.

Again in the US, a reliance upon government to solve all the problems -- people have already started to realize that passing a law or making a program doesn't automatically solve a problem or cure anything except bureaucratic unemployment.