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Polar vortex weather warnings for 15 states as monster storm brings brutal temperatures to millions
The polar vortex has led to freezing temperatures, snowfall, and hazardous road conditions across large regions of the South, ...
1.5 degrees of warming has always been a red line for climate. We just passed it
The world just blew past a key climate threshold. Still, experts say, it's not a reason to give up on climate action.