这150座城市的人口仅为世界人口12%，而其生产总值占2007年全球生产总值的46%。
The 150 metropolitan areas represented just 12% of the world's population but accounted for 46% of the world's GDP in 2007.
斯特恩有关气候变化的报告显示，好消息是，实现这些目标的经济成本可能只需全球生产总值的1%。
The good news, suggests the Stern review of climate change, is that the economic costs of achieving these objectives might be as little as 1 per cent of global gross product.
诺德·豪斯认为全球温度上升4.5华氏度——过去公认的对2100年的预测——将会使全球生产总值下降近2%。
Nordhaus has argued that a global temperature rise of 4.5 degrees Fahrenheit - which used to be the consensus projection for 2100 - would reduce gross world product by a bit less than 2 percent.
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