Would be more sensible to develop synthetic fuels in the short term, and fuel cell drive in the longer term. That allows for a gradual changeover, with current engines being able to run on lower pollution fuels in the intermediate stages.
Meanwhile cancel all wind turbine funding and transfer it to fusion and thorium LFTR development Better still, transfer ALL climate change funding to those projects. With
£1.5 trillion USD a year for research we'd soon have those technologies working.
ITER for example will cost only $18 billion, or a scant few day's worth of climate change funding. Yet at the current trickle of funding it gets, it won't be ready until 2017.
Clean nuclear -> Synthetic fuels -> fuel cells or IC engines. No range limit, short refueling time, low capital cost, reasonable running costs, no need to scrap existing vehicles.
The Greens see humanity's glass as half empty. I see it as half full. Do we go back to the Middle Ages
or forward to the Space Age
?
I say go forward.