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Young men cycle around Khartoum, scavenging for unused oil collected from vehicles during maintenance.
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Inherit the Wind The Gulf Coast is littered with the carcasses of unused oil equipment.
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That's a lot of unused oil.
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Saudi Arabia, a key member of OPEC, is the world's largest oil producer and has the most unused oil output capacity.
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The coronavirus pandemic has slashed fuel demand worldwide, and storage space for the unused oil is rapidly filling, especially in the United States.
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Unused oil rigs sit in the Gulf of Mexico near Port Fourchon, Louisiana August 11, 2010.
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Unused oil rigs sit in the Gulf of Mexico near Port Fourchon, Louisiana in this August 11, 2010 file photo.
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Unused oil tank cars are pictured on Western New York & Pennsylvania Railroad tracks outside Hinsdale, New York August 24, 2015.