Oil pump jack and wind turbines at sunset in central Oklahoma near Calumet.

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An oil pump jack stands in silhouette against a sunset with electrical power generating windmills in the background.

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Size: 4912px × 7360px
Location: Oklahoma, USA
Photo credit: © James Pratt / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: contrast, efficiency, electricity, energy, green, jack, oil, oklahoma, petroleum, power, pump, sunset, turbine, wind, windmill