@Zaphod ,. It’s a pity then that the artic tundra has already started thawing !!
If it continues what "CAN WE " do ??
Donkeyman! 
That should have been pushed more years ago but nowadays first there’s still the exhaust gasses as opposed to the likes of hydrogen, and second it could become just as expensive.
Maybe availability has had a bit to do with it too?
We’re already seeing gas supply shortages; would we ever have been able to get enough to use as the common fuel for vehicular transport too?
Read the " Greenland meltdown update" bit in here:
“…. according to the Danish Meteorological Institute, DMI, the ice sheet ended the summer with an above-average volume, due to one of the shortest melt seasons on record”
One of my friends sends me conservative woman articles. I think one was written by someone we know. It’s an unusual publication with an interesting history.
Anyway here is another alternative eco friendly fuel 
Extract :
"The project, HEMP-30, being led by the University of York, was awarded £200,000 ($276,000) from a total £4 million ($5.5 million) granted under the Biomass Feedstocks Innovation Programme, which aims to increase biomass production that can be used for green energy. The biomass program is part of the Department for Business, Energy and Industrial Strategy’s £1bn Net Zero Innovation Portfolio.
The program is being run in two phases; in the initial phase, projects receive funding to produce innovative project plans; successful projects are then funded to commercialize their initiatives."
LPG fuel was all the rage in the 1980s and many people converted their cars to dual fuel but over the years has gone out of fashion despite lower costs. So much so that servos are removing LPG pumps. Only vehicles like taxis still use it.
LPG costs about 88c/l (44p) at the bowser whereas petrol is about 150c/l (75p)
It’s industrial hemp. Not the same stuff that you put in your pipe.
@AnnieS , l don’t smoke anything, let alone a pipe !!
I suppose you mean the stuff you can make clothes with ??
It does have merit but there is a lot of political oppostion to it, as politicians are unable to tell the difference between the two !!
Donkeyman! 