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.

As the United States looks to reform its health care system and expand access to the uninsured, countries that have moved toward universal health care may offer lessons.

This publication is now archived. Why has the Iraqi insurgency flared up again?It was never completely stamped out, experts say, and Sunni and Shiite insurgents have used anti-U.S. sentiment and disc…

The U.S. government designates Iran as the "most active state sponsor of terrorism," which feeds concerns about Iran’s growing nuclear program.

Experts say Islamic law, or sharia, holds wide appeal for Muslim populations in many countries and is beginning to spread via democratic means, but it is also being used as a tool of Islamic militanc…