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1 янв 1970 г. - Exxon lowerd the cost of solar cells

Описание:

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 ноя 2018

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Дата:

1 янв 1970 г.

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~ 55 г назад

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