Foto de stock - 11 August 2022, Niederwerth: Jochen Koop, a biologist at the Federal Institute of Hydrology (BfG) in Koblenz, examines clams in the Rhine, where drought and heat threaten fish and shellfish. Photo: Thomas Frey/Thomas Frey. - Niederwerth/Germany

Imagen: 11 August 2022, Niederwerth: Jochen Koop, a biologist at the Federal Institute of Hydrology (BfG) in Koblenz, examines clams in the Rhine.

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