... but the absolute beauty of CNG is that it can be created from waste products not fossil fuel, and it's not just a carrier of energy like the hydrogen option. So.... create your methane from waste food or spent products (eg. from the dairy industry or sewage works), via anaerobic digestion, mess about with it a bit (compress & clean) to get a pure fuel, bottle it & sell. See organic-power & environment-agency.gov.uk/business/sectors
Meanwhile convert your vehicle, chilterngascars or greenconversions
or buy one greencarsite.co.uk/GREENCARS/Volvo-S60-CNG-Biofuel
.... Get a tank in your drive, fill it with methane-from-waste, add a vehicle filling system, eg. gasfill & voila, extremely low-carbon transport. Now I have to put my money where my mouth is!
The real attraction of this is that you can also use the gas to fuel your house boiler, almost-carbon-free home & transport
PS. why are links switched off? It took me ages to insert them then I had to strip all the useful info!