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World's lakes losing oxygen as planet warms
![view of a cloud-free Peyto Lake](/news/mmg/media/images/lakes_f_5e89c79c-b61d-44d4-b985-6abc3a2cdd8a.jpg)
View of a cloud-free Peyto Lake, Banff National Park, Alberta, Canada
Credit: Wikimedia Commons/Frank Kovalchek
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