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jan 1, 1970 - Exxon lowerd the cost of solar cells

Description:

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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Date:

jan 1, 1970

Now

~ 55 years ago

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