http://blogs.cfr.org/levi/2013/01/08/drilling-into-the-american-energy-boom-in-4-charts/oil-vs-gas-rigs-2/ CFR experts examine the science and foreign policy surrounding climate change, energy, and nuclear security. Sat, 18 May 2013 17:16:38 +0000 hourly 1 http://wordpress.org/?v=3.4.2