Polar-bear-shaped sugar cubes by Jovana Bogdanović. Image via Redesign Your Mind.

Sustainable design might not be the first thing that comes to mind when you think of Serbia, but for the last three years, Natasa Ilincic and Yugoslava Kljakic of the Belgrade-based design and architecture studio od-do arhitekti have been inviting fellow creative thinkers to "Read the full story on TreeHugger