Opec is often in the news when it comes to the world's economy. what commodity does it specialize in? agriculture uranium oil mining

OPEC or Organization of the Petroleum Exporting Countries specializes in petroleum or oil. 

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The oil and natural gas industry generates more than 260,000 jobs in Louisiana – enough to fill LSU's Tiger Stadium three times over. ... The industry paid $688.7 million in direct taxes and fees, and more than $1.346 billion in indirect taxes and fees – for a total of $2 billion contributed to the state treasury.