CNN: Widespread anxiety about the damaging effects of burning fossil fuels, coupled with a genuine fear that oil and gas will become scarce before the century ends are fueling a renewed interest in renewable energy and, in particular, solar power solutions. The PS10 solar tower plant sits at Sanlucar la Mayor outside Seville, Spain. The solar tower plant, the first commercial solar tower in the world, can provide electricity for up to 6,000 homes. Not since the 1970’s, when the …