As temperatures cool down, concerns over climate trends heat up: How Germany’s hot summer is a sign of future challenges

Benjamin Kraemer, an international postdoctoral fellow at the Leibniz Institute for Freshwater Ecology and Inland Fisheries in Berlin, usually jumps into Müggelsee to cool off after a game of beach volleyball. But a few weeks ago, he said, all swimming in the lake was banned: “There was a pretty intense cyanobacteria bloom.”

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