Credit: PETER MATULAVICH/SCIENCE PHOTO LIBRARY

Caption: Pumpjacks (also known as grasshopper pumps and nodding donkeys) work non-stop in this oil field in southern California. They are used to lift liquid out of oil wells when there is not enough pressure for the oil to rise on its own. A pumpjack can lift as much as 40 litres of oil-water mixture with each stroke.

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Keywords: climate, crust, drilling, earth, energy, fossil fuel, global warming, grasshopper pump, lithosphere, natural resource, nodding donkeys, oil field, oil well, petroleum, pumpjack, pumpjacks

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Pumpjacks

K002/2181 Rights Managed

Downloadable master

Duration: 00:00:09.06

Frame size: 640x480

Frame rate: 29.97

Audio: Yes

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 97.8M

Original

Capture format: Betacam SP

Frame size: 720x486

Codec: Uncompressed 8-bit 4:2:2

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