U.S. President Joe Biden used his final address to the UN General Assembly to exhort leaders to press ahead with efforts at peace and reconciliation and included a poignant appeal for democracies.

The annual convening of Climate Week in New York has become one of the largest globally for climate reform, but can the events shore up meaningful commitments amid the worsening effects of global war…

This year’s UN summit offers a rare chance for reform of the world’s leading peace and security body but is bedeviled by major power tensions over intractable wars.

The Supreme Court’s recent ruling to limit federal agencies’ power to interpret laws will have major implications for U.S. climate and environmental policies.

Governments and companies are embracing new emissions-reducing technologies that pull carbon dioxide out of the atmosphere. But it is uncertain whether this can work at the scale and in the time nece…