Environmental campaigners hope the UN meeting will result in a historic commitment to cut international greenhouse gas emissions.
In the run-up to the summit, which has been billed by some as a last chance to save man from runaway climate change, we want to hear what you have to say to the environment ministers and officials at Copenhagen.
A greeting?
An idea?
A message of what climate change means to you?
A warning?
Take a photo of yourself holding your message and add it to the group.
We'll feature some of our favourites on guardian.co.uk and maybe in the newspaper version of the Guardian as well. By posting your pictures in this group you agree to let this happen (though copyright remains with you at all times).