What does it mean for countries around Europe?
This weekend a shocking new record temperature was recorded in the Arctic Circle, amid warnings some parts of the world are heating much faster than others.
Scientists on board the icebreaker Polarstern have been without supplies for two months.
You probably wouldn't even notice the difference.
Copenhagen is known for its bikes and green outlook - but what are the latest ways the Nordic nation is trying to lead the way on cutting back on carbon? Greg Lory went to find out.