The Gulf of Mexico oil spill spotlights the growth of deepwater drilling and the challenges of balancing strong environmental regulation with efforts to expand U.S. domestic oil production.

International actors are redoubling efforts to restore Afghanistan’s agriculture sector and weaken the massive opium trade that helps fund the Taliban. But competing strategies and corruption could s…

Non-OPEC oil producers, which turn out most of the world’s oil, are operating near capacity.

Political volatility among the world’s leading oil producers suggests deeper causes for recent price spikes.

Libya, for years a thorn in the side of U.S. policymakers, has boosted its profile in recent years, renouncing terrorism and abandoning its WMD. In response, the U.S. State Department has removed Lib…