Solar Prices (1 янв 1970 г. – 1 янв 1980 г.)
Описание:
Solar cells became cost effective for use on land and the cost of producing solar energy cut by 80%. Not only did this energy source become commercially feasible, it also allowed for power availability to those in rural areas and not near power lines. (ProCon.org)Добавлено на ленту времени:
Дата:
1 янв 1970 г.
1 янв 1980 г.
~ 10 years