Category: World

A hydropower project on the Blue Nile forced Egypt, Sudan and Ethiopia to confront a question with no legal answer: who owns a river that crosses borders?

The alliance clause everyone cites is shorter and more flexible than most assume. Its power comes from politics and forces, not automatic obligation.

A handful of exporting countries, a few chokepoint waterways and one fertilizer market determine what much of the world pays for bread.

Retreating sea ice is opening northern sea lanes that could cut thousands of miles from Asia-Europe voyages, and the competition is already underway.