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A man skates on an outdoor ice rink during an unusually warm day for December in Toronto, Canada, on Dec. 11, 2021. Toronto's temperatures reached 18 degrees Celsius on Saturday. (Photo by Zou Zheng/Xinhua)
People run along a trail during an unusually warm day for December in Toronto, Canada, on Dec. 11, 2021. Toronto's temperatures reached 18 degrees Celsius on Saturday. (Photo by Zou Zheng/Xinhua)