转载者按：世界科学家并不像人们宣传的那样一致同意全球变暖持续的观点，争论是长期存在的。一个最典型的事例：美国部分科学家就气候变化问题被严重夸大的观点发表郑重声明。

附1、专栏的前言：

President Obama says that "few challenges facing America and the world are more urgent than fighting climate change. The science is beyond dispute and the facts are clear." In fact, many scientists disagree with the "facts," their certainty, and their interpretation. Over 100 of them have signed the statement that appears in the Cato Institute's newspaper ad.

奥巴马总统说“应对气候变化，毫无疑问是美国和世界所面临的最严峻的挑战。这已被科学证明是确定无疑的现实。”但是在实际上，许多科学家对这个“现实”确定性的认可和解释并不一致。有100多名科学家签署了一份声明，并以美国凯托研究会的名义在报纸上公布。

附2、声明正文译稿：

“应对气候变化，毫无疑问是美国和世界所面临的最严峻的挑战。这已被科学证明是确定无疑的现实。”
—  当选总统贝拉克-奥巴马，2008年11月19日 
 
恕我们直言，总统先生：

事实并非如此

（翻译 马德）

我们，在下列签名的科学家，就气候变化问题被严重夸大的观点发表郑重声明。
1、地球表面气温变化在过去一个世纪并没有连续而显著的变化从而导致最近十年期间的全球变暖。
2、控制人口增长和资源的利用，并没有能够减轻气候灾害事件造成的严重损失。
3、由计算机模拟的气候模型所作出的地表气温急剧变化的悲观预测，并不符合近期若干年来的实际状况。
4、总统先生，您对于气候变化方面的科学研究的情况和在这个领域的科学论争的了解与表述流于简单，这是不能为我们所接受的。
（签名略）

附3、声明英文原文：

"Few challenges facing America and the world are more urgent than combating climate change.The science is beyond dispute and the facts are clear."

— PRESIDENT-ELECT BARACK OBAMA, NOVEMBER 19 , 2008

With all due respect

Mr. President,

that is not true.

We, the undersigned scientists, maintain that the case for alarm regarding climate change is grossly overstated. Surface temperature changes over the past century have been episodic and modest and there has been no net global warming for over a decade now.^1,2 After controlling for population growth and property values, there has been no increase in damages from severe weather-related events.³ The computer models forecasting rapid temperature change abjectly fail to explain recent climate behavior.⁴ Mr. President, your characterization of the scientific facts regarding climate change and the degree of certainty informing the scientific debate is simply incorrect.