AlterNet: Solar power, always a popular subject but a tiny piece of America’s energy puzzle, could be looking up — literally — as power drawn from America’s roofs could provide juice without the carbon, trade balance and security concerns of fossil fuels and the huge upfront costs and land-use hassles of bigger solar projects. Permitting delays for large photovoltaic projects (where sunlight hits silicon chips and creates electricity) are likely to disrupt an industry endeavoring to grow at …