Aside from obtaining enough fuel (see the movie A CRUDE AWAKENING) the
fact that 90 percent of transportation will still be powered by CO2
emitting vehicles will guarantee mass extinction in the oceans. When
CO2 reaches 450 ppm ocean acidification will wipe out all calcium
based life forms including the organisims that form the base of the
food chain. This is likely to occur by around 2030. The fact that
there will be no reduction that is meaningful in the transportation
sector guarantees that we will surposs 450 ppm handily. The other
problem is that even IF we could eliminate CO2 emissions from all
transportation sources the fact of the matter is that global
population increase coupled with the demographic shift from developed
to developing nations, and the parallel result of that population
greatly increasing meat and dairy consumption will bring about another
wave of CO2 emissions as farming, fertilizers, and other factors
related to food