I found a great advent calendar on the internet! Being run by an environment- related site, the questions will offer some interesting information. Go directly to the calendar here. It only exists in Norwegian, but don´t despair! Here is some help by the phenomenal Norwegian- English section of Google Translate!
The site environment.no is run by the environmental authorities of Norway. It´s a
great website for finding relevant, reliable information about environmental issues, based on facts and scientific research. I recommend you to take a look around!
The photo is from a skiing trip (cross country) in Bymarka. Love the sparkling snow in the moonlight!