Dec 12, 2002-- While on a teaching and trekking expedition, Dr. Irvine-Halliday had an idea -- to light up rural homes without electricity. He invented White Light Emitting Diodes (WLED) which are powered by energy-renewable water mills, solar panels, wind and water turbines and pedal generators. (800 reads)
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Optimist: Person who travels on nothing from nowhere to happiness.
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