We know that we need to diversify our sources of energy. Whether or not you think that climate change is a problem shrinking fuel supplies political turbulence in oil-rich areas and natural and man-made disasters make it clear that reliance on fossil fuels is not sustainable environmentally or otherwise. The array of renewable energy sources – wind solar tides and geothermal heat – provide cleaner greener energy and allow nations or regions to choose a mix that is most efficient and effective