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Solar Cells
today are mostly made of silicon, one of the most common
elements on Earth. The crystalline silicon solar cell was one of the first
types to be developed and it is still the most common type in use today.
They do not pollute the atmosphere and they leave behind no harmful waste
products. Photovoltaic cells work effectively even in cloudy weather and
unlike solar heaters, are more efficient at low temperatures. They do their
job silently and there are no moving parts to wear out. It is no wonder
that one marvels on how such a device would function.
To understand how ....
Word count: 1165 - Page count: 5
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