The authors acknowledge that a transition from fossil fuels石化燃料 to renewable energy is easier to recommend than to achieve. Many countries are locked into鎖定 using fuels like coal煤.

Here in Germany coal provides提供 nearly half the electricity. But because greenhouse gases溫室氣體 are building up in the atmosphere so rapidly迅速, the conclusion結論 is that it's better to make the change sooner rather than later. Professor Jim Skea at Imperial College is a leading figure on the panel.

"The message is that we need to start from 2020 onwards起. If you wait as long as 2030 to put in place measures, it is going to start to get difficult. Emissions排放量 have risen more quickly in the last ten years than they have at any point in the past, and if we carry on in進行中 that kind of way till 2030, then you will be faced with these difficult choices. We need to move much more quickly than that."

One surprise is a low estimate for the cost of phasing out淘汰 fossil fuels and boosting促進 wind and solar power. The panel says that less than one tenth of 1% will be shaved off annual global growth. However, this figure rests on a host of一系列 assumptions假設, and for the moment, renewable energy still needs subsidies補貼, which raises questions about public acceptance.

The panel does believe its options are feasible and it hopes they'll be implemented in the coming years.

http://www.bbc.co.uk/worldservice/learningenglish/language/wordsinthenews/2014/04/140414_witn_climate_change.shtml

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