The German Energiewende is the largest undertaking in the world to transition to renewable energy. Rightfully it is getting a lot of attention. There already many lessons to be learnt of what to do and also some of what not to do.
Smaller in magnitude but also well worth paying attention to are two American versions of Energiewende. One is a state, Hawaii, and the other is a city, Fort Collins, Colorado.
Energy efficiency as well as the “dark green” renewable energy of wind and solar are the best sustainable options to reduce CO2. However, if urgent CO2 reduction is the focus, one must not lose sight of additional options.
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