一项新的研究证明，要防止激烈的长期气候变化也许需要更大幅度削减二氧化碳排放量。
A new study suggests bigger cuts in carbon dioxide (CO2) emissions may be needed to prevent drastic long term climate change.
不仅仅是在最近关注的坎昆会议，哥本哈根会议上也就气候变化引发了激烈的讨论。
It is not only the recently publicised Cancun Talks - at the Copenhagen Talks, climate change also triggered heated debate.
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