VIDEO They may be focused on global warming in Copenhagen, but in many other parts of Europe the focus at the moment is more on how to warm up.
Temperatures in Moscow have plunged to minus 21 degrees celsius (minus 70 fahrenheit) after the city had its warmest December day in recorded history earlier this month.
The average winter temperature in Moscow is minus two degrees celsius (minus 25 fahrenheit).
At least three weather systems are currently bringing freezing temperatures to Europe, with warnings that bad weather is on the way for those not yet affected.
Serbia was just one of the countries to experience its first snow storm of the year.
There are similar scenes in countries further south, including Spain, where many regions have issued extreme weather alerts. Traffic has been disrupted for the second day running, and people are being urged to be extra careful on the roads.
