If ecological sin is real, then ecological repentance must be real, too: pipes that work, standards that bite, and the stubborn, persistent work of repair.

The United States — the largest source of historical emissions and top user and producer of oil and gas — will stand as the only country in the world not part of the agreement.

Across Vietnam's flood-battered central provinces, nuns observed Christmas quietly, scaling back celebrations to redirect resources to those whose homes, crops and livelihoods were swept away by storms and floods.