Take a sniff of this Christmas tree chemis-tree Rosie Alderson, PhD Dec 22, 2021 · 5 min readPhoto by Sandra Seitamaa on Unsplash A couple of winters ago, I travelled to the ski resort of Levi, in Finland. Nestled in the arctic circle, the landscape is awe-inspiring— great swathes of white, punctuated only by majestic snow-laden trees and small, charming settlements populated with cosy wooden buildings.