The 12 countries that make up OPEC have about 72% of the world's proven crude oil reserves.

Name: The 12 countries that make up OPEC have about 72% of the world's proven crude oil reserves.
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OPEC (Organization of the Petroleum Exporting Countries) members indeed hold a significant portion of the world's proven crude oil reserves, with estimates often around 70-80%, making the statement that they have about 72% accurate.

The 12 Countries That Make Up OPEC Have About 72