地球的力量 第2集 大氣(24)難以預(yù)計(jì)的巨變
翻開地球的歷史
as carbon dioxide levels in the atmosphere havechanged,
大氣層二氧化碳濃度有所變化
so has the temperature of the whole planet.
使得整個(gè)地球的溫度
In fact, it's now becoming clear
事實(shí)上，現(xiàn)在逐漸了解
that even relatively small changes in carbon dioxide
甚至是細(xì)微的二氧化碳濃度變化
could begin a chain reaction.
也會(huì)導(dǎo)致連鎖反應(yīng)
And this would lead to unexpectedly large changes in our climate.
這會(huì)使得我們的氣候產(chǎn)生難以預(yù)計(jì)的巨變
To find out what this might mean for our future, I'm off to Siberia.
為了這對(duì)于我們的未來意味著什么，我前往西伯利亞
This is one of the remotest and coldest regions on the planet,
這是地球上最遙遠(yuǎn)和寒冷的地方
and yet hidden in this frozen ground is the potential for a climate disaster.
目前有一個(gè)潛在的氣候?yàn)?zāi)禍在這片冰原下
It's called methane,
被稱為甲烷
and it's a far more powerful greenhouse gas than carbon dioxide.
這是比二氧化碳要強(qiáng)得多的溫室氣體
And that's what I'm looking for.
那正是我找尋的
