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The Mendenhall Glacier in Juneau, Alaska is pictured here in February 2021. The glacier is one of many worldwide which are retreating. (Becky Bohrer/AP/via The Canadian Press) Glacier mass is decreasing worldwide with an average total loss of 267 billion tonnes of mass per year, says a new study.  The period looked at was between 2000 and 2019. The loss of glacier mass during this period also accounted for 21 per cent of the observed sea-level rise, the authors said. The study, “Accelerated global glacier mass loss in the early twenty-first century” was published in the journal Nature on Wednesday. Glacier mass loss has been accelerating by about 50 billion tonnes annually each decade since 2000, the study found. 

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