‘The blue flags are proof’: how Greece cleaned up its act on sewage

Greeks take their seas seriously, with the construction of one of the world's biggest sewage treatment plants a real game-changer

The shimmering waters along the Athenian riviera offer a welcome respite in the summer heat. In one of Europe's most congested cities the sight of ever more beaches attaining blue flag status - a mascot of water quality - has heightened the sense of relief that the coastal location affords. For those who flock to its coves, rocks and sandy stretches, the shoreline that extends from the Greek capital's southern suburbs has become the perfect antidote to the rising temperatures that have accompanied climate breakdown.

It was not always so.

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