The second IPCC installment showed that the temperature rise that we are expected to see sometime around 2055-2080 will create a net cost of 0.2-2% of GDP – the equivalent of less than one year of recession. So, while the IPCC clearly establishes that global warming is a problem, the cost is obviously much less than that of the twentieth century’s two world wars and the Great Depression.
第二期IPCC报告显示我们预计将在2055-2080年前后看到的气温升高会带来占GDP0.2-2%的净成本——相当于不到一年的经济衰退。因此，虽然IPCC明确提出全球变暖会带来问题，但其带来的成本显然远低于二十世纪的两次世界大战和经济大衰退。