For the nature invites to informal workshops on climate change. The workshops will focus on what you as a citizen can do, and will take place 24/7 in Smoljan and 1/8 in Stara Zagora. It is all part of the European Commission's climate change program that you can read about here. (English site)
Wired has a nice post on the topic... appearantly strange light phenomena, similar to Aurora Borealis are visible over the northern hemsphere. Beautiful, and most likely man made.
Sources: For the nature , Wired , Youtube