We should think about a day when most of our energy sources for electricity and transportation are renewable sources rather than fossil fuels. Why? Because this is an achievable goal as R&D in solar continues to push the harvest efficiencies of materials upwards.
via The Energy Collective – The world’s best thinkers on energy & climate http://theenergycollective.com/christine-hertzog/302226/renewable-energy-breaking-fixation-fossil-fuels
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Prometheus Institute 