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

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

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

Fire from the natural gas well shot about one hundred forty meters into the air.

VOA: special.2009.03.22

"The types of opportunities that are left for natural gas exploration in the U.S.have changed.

VOA: special.2009.10.23

His main targets were companies that supplied the public with water, electricity,and natural gas.

VOA: special.2010.08.05

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

VOA: special.2009.12.07

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

VOA: special.2010.02.02

Patients may be asked to identify smells like smoke, natural gas or fruits.

VOA: special.2009.09.15

Russia is first in what are called "proved reserves" of natural gas.

VOA: special.2009.10.23

Natural gas provides Americans with about one-fourth of their energy.

VOA: special.2009.10.23

Water heaters that burn natural gas create carbon monoxide.

VOA: special.2010.02.02

Methane is better known as natural gas.

VOA: special.2009.12.30

Others were in natural gas wells.

VOA: special.2009.03.22

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

Gazprom,Russia's gas export monopoly, also had signed a deal to sell China 70 billion cubic meters of natural gas a year.

VOA: standard.2009.10.13

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

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

This so-called 'bio-gas' is burned like natural gas in a small electric power plant right on Vander Haak's farm.

VOA: standard.2010.02.23

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

"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

But Russia recently called into question Ukraine's ability to pay its December natural gas bill.

VOA: standard.2010.01.01

The two sides also agreed to work to develop China's vast natural gas capacity.

VOA: standard.2010.05.25

Most of the electricity Americans use is produced by coal,natural gas, or nuclear generation.

VOA: standard.2010.03.23

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