The mighty Nile, threatened by waste, warming, mega-dam

Early one morning in Cairo, volunteers paddle their kayaks across the Nile, fishing out garbage from the mighty waterway that gave birth to Egyptian civilisation but now faces multiple threats.

Hospitals filling up in Europe's most polluted capital

Children are missing school and hospitals are running out of beds as a noxious smog smothers Skopje, earning the small Macedonian city the grim distinction of being Europe's most polluted capital.

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