The US navy on Wednesday launched its first carrier strike group powered partly by biofuel a mix made from beef fat, calling it a milestone toward easing the military’s reliance on foreign oil. [The Guardian]

California’s attorney general is investigating Exxon Mobil on whether the company lied to the public and shareholders about the risks of climate change. [The NY Times]

Devon Energy Corp. executives said Wednesday they are planning layoffs over the next few months. [NewsOK]