The Swedish edition of a warm story about the environment and survival.
The mother polar bear and her small cub Nanu are forced to take a long swimming trip. They have to leave their home because ice is melting at an alarming rate, and there are fewer and fewer ice floes in the water around them. A friendly tern comes to their aid.
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Björnmamman och hennes lilla unge Nanu beger sig ut pa en lang simfärd. De är tvungna att lämna sitt hem da glaciären hotar falla sönder, och isflaken omkring den hela tiden minskar. Den vänliga tärnan hjälper de utmattade simmarna med att spana under deras farliga resa.