The planet Mars has gone through an ice age and is now warming up, scientists say.
科学家表示，火星已经脱离了冰河时代，现在正在升温。
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。
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。
We can't switch off global warming just by being good in the future. We have to start being good now.
我们仅通过在未来采取良好措施是不能阻止全球变暖的，我们必须现在就采取行动。
Such is our dependence on fossil fuels, and such is the volume of carbon dioxide already released into the atmosphere, that many experts agree that significant global warming is now inevitable.
我们对化石燃料的依赖如此之深，已经排放到大气中的二氧化碳又是如此之多，以至于许多专家一致认为，目前情况下全球变暖是不可避免的。
A third sources, the warming-enhanced decay of organic matter in forests and soils, especially in the middle and higher latitudes, is now being recognized as potentially significant.
第三个来源，特别是在中纬度和高纬度地区，森林和土壤中因气候变暖而加剧的有机物腐烂，现在被认为具有潜在的重大意义。
Now, of course, we know that whatever you call it, human behavior is warming the planet, with grave consequences ahead.
当然，如今我们知道，不管怎么说，人类行为正在导致全球变暖，将会带来严重的后果。
Now, at this point I have to make the obligatory disclaimer that no individual weather event can be attributed to global warming.
现在，在这一点上我有义务对单独的天气现象不是由全球变暖引起的观点予以否认。
Now, he seemed to be saying that stopping global warming was an urgent matter after all.
现在，他似乎表明，阻止全球变暖是一项紧急的工作。
Nearly half of Americans – 48% – now believe the threat of global warming has been exaggerated, the highest level since polling began 13 years ago, the poll published today by Gallup said.
盖洛普今天发布的一份民意调查显示，现在有近一半美国人——48%——认为全球变暖的威胁完全是夸大其词，这是自13年前开始民意调查以来的最高比例。
Perhaps now we can put the manufactured controversy known as Climategate behind us and turn to the task of actually doing something about global warming.
或许现在我们可以把那个所谓的“气候门”引发的争议抛之脑后，投入到全球变暖的实际行动任务中。
Worrying about global warming [that will happen] 100 years from now is a slight luxury to those people.
对于那些人来说，担忧100年之后才会发生的全球变暖着实是有些奢侈的事。
The deal is also further evidence that the once-frosty ties between East Asia's two largest nations are now rapidly warming.
这笔交易进一步证明了，东亚两个最大国家之间曾经冰冷的关系，现在正迅速升温。
The talk now in the climate labs — in the tea rooms and, yes, in their private emails — is of tipping points and runaway warming.
如今在气候实验室——在茶室，在它们的私人邮件中——他们谈论的是有关临界点和失控的气候变暖。
A majority of people now believe - incorrectly - that global warming is not even caused by humans.
这其中大部分人现在转而相信全球变暖并不是由人类活动导致这一错误观点。
We are now faced with a similarly momentous challenge: global warming.
现在我们面临着一个同样重大的挑战——全球气候变暖。
Having agitated about global warming for decades, northerners now find the focus is not on them but on wildlife.
数十年来对全球气候变暖焦虑不安的北方人现在发现焦点问题不是他们自己，而是野生动物。
Now that the weather is warming up, I thought I get some exercise instead of taking the bus all the time.
现在天气暖起来了，我想我也该运动运动，不要天天坐公车了。
The dangers outlined by the CNA report mostly lie in the future, but there are security concerns connected to global warming that threaten us right now.
CNA报告大致列出的危险大多潜伏于未来，但是与全球变暖联系在一起的安全问题已经开始威胁着我们。
Exxon Mobil, led until recently by a fierce sceptic of global warming, now concedes that there is a problem, and that its products are contributing to it.
过去一直对全球变暖论持强烈怀疑态度的埃克森美孚化工近日终于勉强承认其产品助长了该不良趋势。
The RSPB also claims now that installation of the turbines could release significant carbon dioxide from the peat bogs affected, undermining the turbines' potential to combat global warming.
RSPB现在还声称，风力涡轮机的安装会从受到影响的泥炭沼泽中释放出大量的二氧化碳，这样就会削弱并破坏涡轮机解决全球变暖问题的潜力。
Now scientists have combined weather station records with satellite measurements to find that the frozen continent is indeed warming, according to research published in the scientific journal Nature.
目前科学家们综合气象站的记录以及卫星测量的数据，发现南极这个冰冻的大陆实际上也在变暖。这项研究结果发表在科学杂志《自然》(Nature)上。
Scientists call the findings both surprising and "alarming," because they suggest global warming is influencing storms now — rather than in the distant future.
科学家称，这一发现既让人惊讶，同时也令人担忧。因为他们认为，全球变暖的趋势目前正在影响着暴风雨的发生，这种情况并不是要等到遥远的未来才会出现。
Nancy Pelosi, the new speaker of the House, is now turning her attention to global warming.
全球变暖问题同样进入众议院新任议长Nancy Pelosi的视线。
We're trying to understand how the climate that works so well for growing great wine grapes right now might be affected by even modest global warming, "Diffenbaugh said."
“我们正试图着去理解气候是如何使得酿酒葡萄生长得如此之好的原因，而只是些微小的气候变暖也会影响其生长，”Diffenbaugh说。
Perhaps only 5% of coral reefs can now be considered pristine, a quarter have been lost and all are vulnerable to global warming.
现在未遭受人类破坏的珊瑚礁大约只剩5% ，被完全破坏的占到1/4，而面对全球气候变暖，所有的珊瑚礁都是不堪一击的。
Perhaps only 5% of coral reefs can now be considered pristine, a quarter have been lost and all are vulnerable to global warming.
现在未遭受人类破坏的珊瑚礁大约只剩5% ，被完全破坏的占到1/4，而面对全球气候变暖，所有的珊瑚礁都是不堪一击的。
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