Melting glaciers mean an uncertain future for Europe's rivers

The Rhône Glacier in Switzerland is the source of the Rhône River, which flows through Switzerland and France. Swiss glaciers like this one are melting quickly, reduced by nearly two-thirds of their ice over the past century.

Europe is warming faster than any continent. That's speeding up glacial melt, which is already threatening Europe's largest rivers.

(Image credit: Rob Schmitz)