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1 ene 1970 año - Exxon lowerd the cost of solar cells

Descripción:

Exxon funded research of Dr.Elliot Bernam to prodice a cheaper solar cell. The cost was brought down from $300 to about $20 per watt.

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econ

12 nov 2018

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466

fecha:

1 ene 1970 año

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~ 55 years ago

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