Methane, familiar to most people as the main component of natural gas fuels, is a greenhouse gas less common than carbon dioxide in the atmosphere but far more potent.

甲烷是人们所熟悉的一种气体，是天然气燃料的主要成分。

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And because it is the main ingredient in natural gas, it leaks from many older natural-gas pipelines.

而且因为甲烷是天然气的主要成分，它通过许多老式的天然气管道泄露。

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The challenge is to take a molecule of methane, the main component of natural gas consisting of one carbon atom and four hydrogen atoms, and turn it into something bigger.

天然气的主要成分是甲烷，它含有一个碳原子和四个氢原子，这项转化的关键是把一个甲烷分子变大。

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

VOA: special.2010.08.05

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

Carbon-dioxide emissions account for nearly 84% of greenhouse-gas emissions, while methane the main ingredient in natural gas makes up 8.8%, according to a recent Environmental Protection Agency report.

WSJ: Rise in U.S. Gas Production Fuels Unexpected Plunge in Emissions

Methane is the main component of natural gas.

NPR: EPA Methane Report Further Divides Fracking Camps

Perched on a rooftop just blocks from the Republican National Convention's main arena is an outpost for the natural gas industry.

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