Battery Powered: The Promise of Energy Storage
The plunge in oil prices that began in mid-2014 has been relentless. It has pushed a clutch of oil-exporting nations into deficit spending, hobbled Russia’s ambitions, and altered the calculus behind Iran’s nuclear program. It has also given an opportune boost to the U.S. economy and other petroleum-consuming countries. No other force on earth packs such latent capacity to move events. Apart from one, that is: batteries.
http://www.foreignaffairs.com/articles/143065/steve-levine/battery-powered
By Rob

Nunn (CC BY 2.0)