The most important renewable power sources are solar, wind, and hydroelectric, but other sources offer tremendous growth potential (e.g., geothermal, biomass, tidal, and wave power). Unfortunately most of our electricity is still produced by burning non-renewable fossil fuels, which take millions of years to regenerate. Combustion of fossil fuels also releases huge quantities of carbon dioxide into the air, which exacerbates the greenhouse effect and heats up our atmosphere, causing global climate change. Nuclear power plants involve health and safety risks related to accidents and toxic waste disposal, and also require huge amounts of scarce water for cooling. Adventerra’s Energy Hogs game teaches players how to conserve electricity, reducing the need to burn fossil and nuclear fuels.