Source google image: https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Parabolic_trough_at_Harper_Lake_in_California.jpg/220px-Parabolic_trough_at_Harper_Lake_in_California.jpg
Energie solaire usa
Source google image: https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Parabolic_trough_at_Harper_Lake_in_California.jpg/220px-Parabolic_trough_at_Harper_Lake_in_California.jpg