The Rapid Equipping Force seeks solutions to problems soldiers encounter in the field — such as packing pounds and pounds of batteries on patrol.

If you could see inside the cars on a freight train, you'd know more about which parts of the economy are up — or down.

Reports over the past couple years have suggested sky-high U.S. carbon-dioxide emissions have been falling, but what about the global energy picture? A new report suggests its nothing to write home about.

A promising new technology aims to store electricity for the power grid on the cheap.

Can natural-gas companies and environmental groups together set standards for fracking that will win the public's trust? An experiment in Pennsylvania will try.

President Obama highlights his energy policy at an event in Illinois today. What’s that policy, and will it get more attention in the second term than it did in the first?

We ask Ethan Zindler of Bloomberg New Energy Finance if a clean energy boom and the expansion of fracking are mutually exclusive.

Belgium is building an artificial island in the North Sea to store water pumped by wind turbines in periods of low electricity demand. When electricity is needed, the water will be released.

In our Petro-State podcast, we talk to Michael Levi of the Council on Foreign Relations about the potential of natural gas to transition us to a low-carbon future. And we play fracking BS Detector.

Up to half the world’s food is wasted — that’s the conclusion of a study by Britain’s Institution of Mechanical Engineers.