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Reindeer near Santa's hometown need help to survive climate change

In our series "Eye on Earth," we explore how climate change is threatening a symbol of Christmas: Santa's famous reindeer. Over the past 20 years, wild reindeer and caribou populations have declined by more than two million. Mark Phillips reports from a city known as Santa's home town to find out why these animals are struggling to survive after more than a million years on earth.
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