Loss of forests is a major contributor to greenhouse-gas emissions. Plans to devise a policy tool for using trees for carbon dioxide sequestration are now under way.

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…

China’s growing military capabilities pose a concern for U.S. security interests. Experts say the United States must push for greater engagement with China’s military to reduce the potential for misu…

Iraqi lawmakers approved new ground rules for the U.S. troop presence, including a U.S. withdrawal by 2011. But questions about the accords’ legal longevity remain.

Whether to engage heads of rogue states, a perennial foreign policy dilemma, has emerged in the 2008 U.S. presidential campaign.