Its an interesting technology likely to be advanced faster with use.
If you would look deep into the production aspects, beginning to end life, carbon footprints of hybrids and electric cars, you would find they are not the answer....yet.
But without more regular use, we will wait much longer for that technology to advance to the point it does work out for the best. (and we are very close). My "source" is an engineer that does design on these types of drivetrains. His personal environmental chose is still gasoline, but we don't have LA smog. In Cali. he drives a hybrid or electric.
