News bites: Exxon knocks gas export delays, Hansen knocks Dem climate plan, and more

Reuters reports that Exxon CEO Rex Tillerson is putting pressure on the Obama administration to approve natural gas export proposals.

The Wall Street Journal examines a recent drop in U.S. coal exports.

Bloomberg reports on renewable energy investments in developing nations.

The New York Times explores Energy Department efforts to curb emissions of sulfur hexaflouride, a very potent greenhouse gas.