As the waste materials decompose, they produce methane gas.
废物腐烂时会产生沼气。
Another gas associated with the spread of agriculture is methane.
另一种与农业扩张有关的气体是甲烷。
Early farmers started clearing forests and livestock produced a lot of extra methane.
早期的农民开始砍伐森林，牲畜产生了大量额外的甲烷。
The burning of methane generates carbon dioxide that is released into the atmosphere.
燃烧甲烷产生二氧化碳，然后释放到大气中。
Other ancient bacteria consumed methane, greatly reducing its amount in the atmosphere.
其他古代细菌消耗甲烷，大大减少了甲烷在大气中的含量。
Animals produce methane, which is another dangerous greenhouse gas when they burp and fart.
动物打嗝、放屁时会产生另一种危险的温室气体甲烷。
The large amount of methane contained in the atmosphere surrounding Neptune stained it blue.
围绕海王星的气层内所含大量甲烷将它染成了蓝色。
Therefore, the methane now emitted from open landfills should instead be burned to produce electricity.
因此，现在从露天垃圾填埋场排放的甲烷应该被用来发电。
Many environmental experts now believe that methane is more responsible for global warming than carbon dioxide.
许多环境专家现在认为，甲烷比二氧化碳对全球变暖负有更大的责任。
Other data from the Vostok core show that methane gas also correlates closely with temperature and carbon dioxide.
来自Vostok 地核的其他数据显示，甲烷气体也与温度和二氧化碳密切相关。
The latest research will help astronomers distinguish between the two sources of methane in their search for extraterrestrial life.
这项最新发现将帮助天文学家在寻找外星生命过程中辨别两种来源不同的甲烷。
Although the system would consume energy, it would return energy to the grid via methane generation from composting nonedible parts of plants.
尽管该系统会消耗能源，但它会通过从植物不可食用的部分堆肥产生的沼气将能源回馈给电网。
Therefore some scientists postulate that the Earth's earliest atmosphere, unlike that of today, was dominated by hydrogen, methane, and ammonia.
因此，一些科学家推断，地球早期的大气与现在的不一样，主要由氢、甲烷和氨构成。
The methane concentration nearly doubled, for example, between the peak of the penultimate glacial period and the following interglacial period.
例如，在倒数第二个冰期的高峰和接下来的间冰期之间，甲烷浓度几乎增加了一倍。
Many scientists now attribute much of the warming of early Earth to oxygen-intolerant microbes—methanogens—that produce the greenhouse gas methane.
现在，许多科学家把早期造成地球变暖的大部分原因归结于厌氧微生物——产甲烷菌——它产生了温室气体甲烷。
In Earth's earliest atmosphere, methane and carbon dioxide occurred at much higher levels than at present-a circumstance that was favorable for early life.
在地球最早的大气层中，甲烷和二氧化碳的含量比现在要高得多，这对早期生命来说是有利的。
When our Sun later became hotter, the continued removal of atmospheric carbon dioxide and methane by early bacteria kept Earth's climate from becoming too hot to sustain life.
当我们的太阳后来温度变得更高时，早期细菌持续清除大气中的二氧化碳和甲烷，使地球的气候不至于变得太热而无法维持生命的存在。
Far from the sun, in the outer solar system, beyond Jupiter's orbit, temperatures are low enough to permit ices to form out of water and out of gases like methane and carbon dioxide.
在远离太阳的外太阳系，在木星轨道之外，温度低到足以使冰从水以及甲烷和二氧化碳等气体中形成。
Paper in landfills causes the release of methane, a gas that is an important factor in climate change all around the world.
垃圾填埋场的废纸会释放甲烷，甲烷是导致全球气候变化的一个重要因素。
On Titan, methane forms clouds and maybe even rain.
在土卫六上，甲烷可以形成云甚至降雨。
Instead of lava, ash, and sulfur dioxide, these volcanoes spew mud and methane.
这里的火山喷涌出的不是岩浆、火山灰和二氧化硫，而是泥浆和甲烷。
Some landfills have installed systems to capture that methane and make use of it.
有些垃圾填埋场装有设备专门回收利用甲烷。
Once released into the atmosphere, methane could wreak havoc with the world's climate.
一旦释放到大气中，甲烷可能给全球气候造成严重破坏。
They used it to detect methane in the atmosphere of a planet nearly 63 light-years away.
利用这项技术，他们测出距地球约63光年的一颗行星大气中含有甲烷。
As the tundra melts, methane, a strong greenhouse gas, is released, causing more warming.
苔原的融化则会释放出一种重要的温室气体——甲烷，进一步造成全球变暖。
Veganism might not be popular, but it can make a big difference to CO2 and methane emissions.
纯素食主义可能并不受欢迎，但对于二氧化碳和甲烷排放来说，它的减排作用非常大。
This phenomenon can contribute to atmospheric warming, which is why methane is considered a greenhouse gas.
这种现象对大气变暖产生影响，这就是为什么甲烷被认为是一种温室气体。
This phenomenon can contribute to atmospheric warming, which is why methane is considered a greenhouse gas.
这种现象对大气变暖产生影响，这就是为什么甲烷被认为是一种温室气体。
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