ARNO MASSEE / SCIENCE PHOTO LIBRARY ARNO MASSEE / SCIENCE PHOTO LIBRARY
Oil industry. Workers (lower right) talking on an oil platform. Oil platforms are used to drill for and pump oil from below the Earth's surface, often from below the seabed. This is a Pemex oil platform in the Gulf of Mexico. Pemex (Petroleos Mexicanos) is Mexico's state-owned oil company.
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