Sunlight is the most abundant energy source known to man: it powers solar cells, warms the air and is the essential energy for photosynthesis. PF Members offer innovative plans to utilize this valuable resource.
This is just part of a 7.2 kW rooftop solar system in Bayview, Wisconsin, as seen in 2007. (M.J. Monty/Creative Commons)
A rooftop of solar panels can create long-term savings for a home or business. (Pixbay)