When it comes to the available sources of renewable energy, most of the focus is on the sun, since all other sources, like wind and biomass, ultimately are derived from it. But solar presents its own challenges, because it’s most easily converted into heat or electricity and

When it comes to the available sources of renewable energy, most of the focus is on the sun, since all other sources, like wind and biomass, ultimately are derived from it. But solar presents its own challenges, because it’s most easily converted into heat or electricity and