Energy company Entega, whose credentials in the area of green and sustainable energy are better than some organised a "Snowman Demo" to raise awareness of global warming and to get people talking.
I didn't see it live, but rapping snowmen paraded through Berlin and people were encouraged to build their own snowman in Berlin's Schloßplatz. Of course this was all accompanied online via the usual channels.
All in all, 750 snowmen were built. I'm not going to go into the politics of climate change, or bore holes in the logic. I'm not even sure how many of the 750 are still there but it's a pretty cool idea.