Nearly all of Qatar's economy comes from producing petroleum and natural gas.

Niger historically has not produced petroleum and has depended upon imports to meet its domestic requirements.

They negotiate briefly, and the Swiss executive agrees to hold off on producing petroleum with the formula.

Recognized as the founder of the oil industry, his process for distilling bituminous material was later used to produce petroleum.

Ukraine produces and processes its own natural gas and petroleum.

They all have great tendencies to produce petroleum and are all formed from lipids deposited under reducing conditions.

"Neftchala" - was the only trust which produced petroleum in autumn.

"In a country that produces petroleum, how can you live like this?"

This approach does not get to the heart of the matter or tackle the larger problem, which is our falling capacity to produce petroleum.

Today, south Arkansas's oil fields produce petroleum throughout a 10-county area.