尾气中一氧化碳的排放量限制在4.5% 以下。
The limit for carbon monoxide is 4.5 per cent of the exhaust gas.
确切地说，这些气体占温室气体排放量的近一半。
Exactly, these gases account for nearly half the amount of greenhouse gas emissions.
较富裕的国家必须作出更大的努力来减少碳排放量。
这对于全球排放量没有影响。
下面，我们来看看怎样减少碳排放量。
多少的碳排放量才是太多？
天然气的二氧化碳排放量只有煤的一半。
这比全球交通运输业的总排放量还要大。
That’s more than what is produced by transportation worldwide.
今年的排放量可能比去年下降5.9%。
Emissions this year are likely to be 5.9% below last year's levels.
它最多只能捕获90%的二氧化碳排放量。
At best it can only sequester 90 percent of the carbon emitted.
但是，美国的人均排放量仍然是中国的四倍。
However, America’s emissions per person are still more than four times China’s.
他们想要推动工业国家减少二氧化碳的排放量。
They intend to push industrialised countries to cut carbon emissions.
然而，其终极目标在于减少50%的碳排放量。
The final goal however is to reduce the carbon emission by 50%.
这种状况导致电费与碳排放量都高于必要水平。
As a result, electricity bills and carbon emissions were both higher than necessary.
碳标签需要的不仅是对二氧化碳排放量的量定。
Carbon labels need not just measure carbon-dioxide emissions.
我们会买反季节水果，会考虑碳排放量的问题吗？
Do we buy fruit out of season or do we consider carbon emissions?
然而这并不意味着美国将永远回避削减其排放量。
Yet this does not mean that America will never get around to cutting emissions.
这个数字大致相当于过去30年中的全球排放量。
That would roughly match global emissions over the past three decades.
而这仅预计是因人类活动而造成的总排放量的2%。
That is about 2% of the estimated total of emissions from human activity.
而今天的富裕国家更应该减少大约90%的排放量。
In today's rich countries they should have fallen by 90% or so.
他说：“我们已经展现出我们能放慢排放量的增长。”
这能减少二氧化碳的排放量并能省下你花在车上的钱。
This will cut down on carbon emissions and money you spend on a car.
减少温室气体排放量唯一有效的方式是征收碳排放税。
The only efficient way to cut greenhouse-gas emissions is to impose a carbon tax.
减少温室气体排放量唯一有效的方式是征收碳排放税。
The only efficient way to cut greenhouse-gas emissions is to impose a carbon tax.
对巴西来说，这种抑制碳排放量的方法将会相当省力。
And for Brazil it would be a fairly painless way to curb carbon emissions.
对巴西来说，这种抑制碳排放量的方法将会相当省力。
And for Brazil it would be a fairly painless way to curb carbon emissions.
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