The disintegration of South Sudan, the world's newest country, is driving a foreign-policy shift in one of the world's oldest.
The latest delay in approving the controversial pipeline sends Keystone proponents into a lather.
For all the worries about Russia's energy stranglehold over Europe, the continent is still looking to Moscow for nuclear reactors.
Developing nations are now the world's biggest polluters. Are they finally ready to help fight climate change?
Moscow is jacking up gas prices to cow Kiev and scare Europe. It may not work this time.
A small court in The Hague wrestles with an existential question that could put a stop to China's maritime power grab.
The U.S. will soon be an energy exporter. But administration officials are overselling that potential.
Secretary of State Kerry pledges U.S. help in weaning Ukraine, and Europe, off Russian energy.
The U.S. oil boom has unleashed torrents of oil, and sparked a fight over the 40-year-old ban on oil exports.
If the United States is going to help Western allies neutralize Russia's energy stranglehold, it needs to get to the root of why so many people fear fracking.
The International Monetary Fund is giving billions of dollars to Ukraine's cash-strapped government. Will that make the country's new rulers even weaker?
The United States just won a big trade battle with China over materials used in iPhones and missiles, but it might be a Pyrrhic victory.
Why Washington can't afford to neglect its friends in the Gulf.
Berlin is saying "nein" to nukes, and trying to run Europe's largest economy on wind and solar instead. It's not quite working.
Russia's annexation of Crimea could wipe away billions of dollars of Ukrainian debt.
President Obama takes a big risk and scores a win for democracy -- and no one gives a damn.
As Putin's army masses in the East, Europe starts to rethink its opposition to fracking.
How powerful political forces have kept the Japanese nuclear industry going strong after the Fukushima disaster
Russia's invasion of Ukraine is accelerating Europe's search for alternatives to Moscow's energy.
Three years after Fukushima, Japanese officials insist their nuclear facilities are safe. They're not.
Some of the most advanced countries in the world are increasingly rejecting climate change. But where did they get this idea? America, it seems.
Sorry, Congress, America can't save Ukraine by selling it natural gas.
How the American shale gas boom can weaken Russia's hand in Ukraine.
Russian threats of economic reprisals could hurt U.S. firms -- and Russia itself.