Russia, which is underperforming just as it did at the Winter Games in Vancouver, probably can't catch Britain in the gold medal race.

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"When we compare changes in the black carbon to changes in these other indicators, it is clear that most of the increases in black carbon in the late 19th and early 20th centuries, particularly in winter and spring, resulted from industrial emissions - probably from coal burning, " he added.

BBC: Human activities have left a visible mark on the Arctic

There are probably dozens more: In the Chicago area, temporary clubs pop up every winter.

WSJ: I Say, That's One Gnarly Grind You Just Executed