Teamwork and critical thinking combine to for a creative lesson on reducing greenhouse gas emissions. Ebullient environmental studies learners play a game in which they strategize how to place colorful energy wedges together to create a stable triangle. Each wedge represents a category of energy sources. They must take into account the costs and impact on the environment. A ton of background information is provided, as well as the playing pieces, and a worksheet for recording progress. This is an energizing resource!