Wikipedia
Kyogami
Kyogami is a board game based around the issue of climate change and the Kyoto Protocol, which considered reducing greenhouse gas emissions without hindering economic growth. The game was designed to raise awareness of this and most of the game components are made out of recyclable materials.
The basic aim of the game is for the players to expand their businesses without increasing emissions, by cleaning up their plants by trading carbon dioxide quotas and using 'flexible mechanisms' as outlined in the protocol, the winner being the first player to own four factories without chimneys.