The action of oil and natural gas created hydrogen sulfide in the limestone.

VOA: special.2009.12.07

and getting rid of natural gas plants, for instance,

同时关闭天然气工厂等等，

全球变暖与国力 - SpeakingMax英语口语达人

The Tennessee senator also wants more exploration for offshore oil and natural gas, and more conservation and efficiency in electricity use.

VOA: standard.2009.04.25

China is particularly keen to secure supplies of oil and natural gas to fuel its rapidly expanding industries.

VOA: standard.2009.10.13

Natural gas is considered the cleanest of the fossil fuels, the fuels created by plant and animal remains over millions of years.

VOA: special.2009.10.23

Alaska's wealth in oil, natural gas,trees,fish and animal skins makes its purchase one of the greatest deals any country ever made for territory.

VOA: special.2010.02.11

He and his crew put out a natural gas fire in the Sahara Desert in Algeria.

VOA: special.2009.03.22

Natural gas stoves and gas dryers or charcoal grills also create carbon monoxide.

VOA: special.2010.02.02

And since natural gas is a major ingredient in fertilizer, the cost of this essential farm supply could go up,too.

VOA: standard.2009.12.12

Does measures seem to low emissions of greenhouse gases by raising the cost of gasoline, coal,natural gas and other fossil fuels.

VOA: standard.2009.12.12

Expanded U.S.sanctions would cover petroleum, petroleum by-products, oil or liquefied natural gas, tankers,and products used to construct or maintain pipelines.

VOA: standard.2009.09.25

"It could be hitting natural fractures that already exist." Fox notes that toxic gases like benzene,toluene and hexane also accompany natural gas extraction.

VOA: standard.2010.01.02

Analysts say the country needs to adopt the 2010 budget to resume cooperation with the IMF and pay for natural gas imports from Russia.

VOA: standard.2010.02.14

And although known oil supplies are drying up, Yemen has begun exporting liquefied natural gas.

VOA: standard.2010.04.20

They cite Russia's brief war with Georgia and Russia's confrontations with Ukraine over natural gas supplies last year as reasons to remain skeptical about the Kremlin's intentions.

VOA: standard.2009.09.17

They allege that the company's drilling polluted their water with chemicals,metals and methane, the main constituent of natural gas, causing explosions as well as gastrointestinal and neurological illness.

VOA: standard.2010.01.02

Energy has become a major concern in several Western countries, after a dispute between Ukraine and Russia over prices led to major natural gas shortages in Europe earlier this year.

VOA: standard.2009.10.23

The Nabucco pipeline aims to bypass Russia and Ukraine, after natural gas price disputes between the two neighbors led to serious disruptions in supplies to the rest of Europe earlier this year.

VOA: standard.2009.05.11

An Iranian delegation, including Oil Minister Massoud Mir-Kazemi, met with Turkish counterparts in Ankara this week, to sign a deal to build a new natural gas pipeline and to increase gas sales to Turkey.

VOA: standard.2010.07.23

It is not clear what it will be able to do to help revive energy talks with Uzbekistan, Kazakhstan and Turkmenistan, During negotiations in the Czech capital,Prague, the three natural-gas producing nations were not convinced by E.U.offers of more trade and stronger transport links in exchange for their participation in a multi-billion-dollar gas pipeline, known as Nabucco.

VOA: standard.2009.05.11