Reuters on cleaner fuel in Armenia:
In countries like the Netherlands, switching from petrol to gas is seen as a green option.
In landlocked Armenia, it is not concerns over climate change or global warming that are driving growth in gas-powered vehicles. Instead, it is harsh necessity -- and an unresolved war with Azerbaijan, its neighbor to the east.
Most of the world's gas-powered vehicles run on Liquefied Petroleum Gas (LPG), a by-product of crude oil and natural gas refining. Armenia uses the natural gas it has readily available.