I am not turning GREEN just yet. I am not a global warming believer, so I say there must be a reason there are SO MANY fossil fuels in large quantities. Plenty of oil for a looooooong time. Enviro people just don't like the carbon burning. If we go to electric, then we will soon be lithium dependent. There is no way we can support millions of car batteries. Sorry for getting off topic.
Honda has the best insight with the FCX clarity. Hydrogen power. Too energy intensive to get the hydrogen though.