SimCity Societies -- the forthcoming installment in the classic urban simulation franchise -- will include a global warming variable. If your SimSocieties aren't carefully balanced, they'll swamp their environments with greenhouse gasses and die off. The module is produced with BP, who, I guess, are trying to figure out what a giant oil company does next.
The game does not force players to power their cities any specific way, but allows them to make choices, each of which come with advantages and disadvantages. Similar to real-life, the least expensive and most readily-available buildings in SimCity Societies are also the biggest producers of carbon dioxide, an invisible gas that contributes to global warming. Should players choose to build cities dependent on these types of sources for power to conserve their in-game money, their carbon ratings will rise and, at reaching critical levels, the game will issue alerts about the threat of the various natural disasters like droughts, heat waves and others that may strike their cities.
Alternatively, players can strive to create a greener environment and avoid hazards caused by excessive carbon emissions by choosing from a variety of BP Alternative Energy low-carbon power options. Using hydrogen and natural gas plants to wind farms and solar power, SimCity Societies encourages people to learn about some of the causes and consequences of global warming in an engaging, educational and meaningful way. While these power sources maintain nearby property values and keep the cities' citizens safer from disaster, they also mimic real-life in that they cost players more of their funds, and do not produce as much power as less green options that take up similar space. Informative real-world snippets about power production and conservation will also be available in-game, informing players of global warming issues both virtually and in reality.