Small amounts of hydrogen sulfide occur in crude petroleum, but natural gas can contain up to 90%.

Small amounts of hydrogen sulfide can be found in crude petroleum.

The city is the transshipping point and a refining center for crude petroleum brought by pipeline from Iraq.

But by evening workers were trying to contain leaking crude petroleum.

The leading imports are crude petroleum, chemicals, manufactured goods, machinery, and transportation equipment.

And of course, these oils are distilled from crude petroleum, a nonrenewable natural resource.

In her present design and construction, she is not safe to carry even regular crude petroleum oil/ Nicholas said.

But in the long term this Charter may push energy prices down since the supply of crude petroleum and gas will become more plentiful.

Foods, industrial equipment, and raw materials, especially crude petroleum, make up most of the imports.

Exports of crude petroleum and natural gas have recently been around US$3 billion a year.