Trina Solar, a Chinese solar manufacturer, announced this week it will supply LISA Airplanes with solar cells to power a luxury aircraft. The solar cells will provide power for take-off and in-cabin instruments; a fuel cell will provide additional power. This announcement follows biofuel experiments by multiple commercial airline operators.

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Solar power is the most abundant energy resource on earth. Solar is also one of the fastest growing markets in the world. This article explains the basics. http://www.treehugger.com/files/2008/03/how-solar-energy-works.php