Europe’s Great Rivers Are Dying. The Continent Is In for a Shock.

Mr. Coates is a journalist based in the Netherlands and the author of “The Rhine: Following Europe’s Greatest River from Amsterdam to the Alps.”

All across Europe, shipwrecks and skeletons are rising from the deep.

Near Prahovo, Serbia, Nazi ships scuttled in 1944 now lie broken-backed on sandbanks. In Croatia, a 1930s cargo ship protruded from the water. On the newly exposed riverbed of the Danube in Bulgaria, what local experts say is most likely part of the skeleton of an ancient mammoth was found scattered across the sand, like discarded bones after a giant’s picnic.

Much of Europe is in the........

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