Passage: The MENA region has vast reserves of petroleum and natural gas that make it a vital source of global economic stability. According to the Oil and Gas Journal (January 1, 2009), the MENA region has 60% of the world's oil reserves (810.98 billion barrels (128.936 km3)) and 45% of the world's natural gas reserves (  2,868,886 billion cubic feet (81,237.8 km3)  ).As of 2011, 8 of the 15 OPEC nations are within the MENA region.

Question: What is MENA best known for?
petroleum and natural gas