Santa Claus and his elves are in danger of becoming environmental refugees because

Arctic sea ice shrank 18 per cent in the year to September 2012, accelerating a trend observed in recent years.
The National Oceanic and Atmospheric Administration predicts that the Arctic will have no summer sea ice within 30 years.
As the sea melts the methane deposits around the shoreline will be released and further accelerate global warming.
There is no threat - Santa Claus and climate change are just rumours spread by socialists.

Answer: There is no threat - Santa Claus and climate change are just rumours spread by socialists.

Go figure!