The National Renewable Energy Labratory has a very easy to understand explanation of what solar cells (photovoltaics or PV) are, how they work, and the different types.

The National Renewable Energy Laboratory (NREL) is based in Golden, Colorado and is the "only national laboratory solely dedicated to advancing renewable energy and energy efficiency technologies from concept to...

In his book, MacKay explores our population’s addiction to fossil fuels and the problems faced with sustainability. Two issues faced with fossil fuels are they will eventually run out and they are harming our environment...