We are going to run out of oxygen suffocating before oil ends: maybe the Russian abiotic oil origin theory is right; this planet was built on a core of frozen methane, makes sense, very common in Universe; the future of propulsion is electric;Tesla,Samsung, Alevo are investing huge $$ in batteries gigafactories and even Rockefeller pulled out 50 bill $$ from oil;
"" Heirs to the Rockefeller family, which made its vast fortune from oil, are to sell investments in fossil fuels and reinvest in clean energy, reports say."
more here from BBC : http://m.bbc.com/news/world-us-canada-29310475
I had never ever heard of the abiotic oil origin theory, interesting, no real proof I guess, but I'm all for interesting and different theories. (As long as what are theories are viewed as such and not as fact. Theory vs. fact/law - different topic

).
I will point out, however, that batteries are not energy. The way I think of batteries as "green" is to think of them allowing for the capture and distribution of an energy form that can rely on centralized "power plants". By having a centralized production capability you can, so the argument goes, have economies of scale to justify the expense of building devices/establishing procedures at can capture/limit harmful externalities.
Along the same lines I'll point out that electricity is not really a "source of energy". In fact, from what I read, physicists do not really know what electricity is. They know enough to talk to "us" about it so that we can think "OK, got it". But among themselves, physicists do not really to know/agree as to what the hell it is. Maybe Tesla knew. Who knows.
I think that the reason large sums of money are heading into sectors like batteries, wind/sea wave farms, Bio, etc is that they are new and possibly profitable.
I've been interested in pebble-bed reactors for a while now as an
energy source.
http://www.nytimes.com/2011/03/25/business/energy-environment/25chinanuke.html?pagewanted=all