I am a little concerned that this article only looks at a limited range of technologies and we will fall into the trap of thinking that they are the only ones worth developing and ignoring other potential solutions. CNG has been mentioned, hydrogen is a developing technology, and I have travelled here in the UK in a LPG-Flywheel (stored energy) hybrid railcar (the Parry People Mover) which is more economical than most autos and is effectively ready to go into production. There are no doubt many other alternatives just waiting in the wings. I believe that the best idea is to specify only the outcomes (in terms of emissions, energy use, etc) and let the market decide which technology (ies) will prevail.
Debunking PHEV Mythology [View article]
I believe that the best idea is to specify only the outcomes (in terms of emissions, energy use, etc) and let the market decide which technology (ies) will prevail.