(via conservation and reforestation). Factories Green and black factories in Keep Cool do not correspond to any actual types of factories in reality. Instead, they are symbolic of energy generation. Green factories symbolize power generated from renewable sources like wind, sun, and biomass. Black factories represent power from non-renewable fossil fuel sources like oil and coal. In Keep Cool, the only way to truly reduce emissions is to demolish black factories. Protection tokens Protection tokens are meant to represent general measures to adapt to the effects of global warming. Examples include installing flood plains, building reservoirs, and constructing new buildings in areas further away from the coast. In Keep Cool, the cost of protection tokens increases upon every purchase--"Dykes cannot be raised infinitely." References External links Official Keep Cool website Board games introduced in 2004 Educational Games Climate change mass media