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在巴西首都里约热内卢召开的联合国环境与发展大会被人们普遍认为是一次有重要意义的大会。然而,对若干基本问题的认识仍然存在着严重的争议,即使在科学界内部也是如此。最近,美国的四十多位大气科学家联合发表了一份措辞强烈的声明,对联合国环发大会以“极不成熟的科学理论”为依据而采取的一些行动方针表示极为不安。《科学与环境政策预测》杂志的主编在谈到这份声明时说,过去发表的许多有关全球
The United Nations Conference on Environment and Development, held in Rio de Janeiro, Brazil, is widely regarded as a significant conference. However, there is still serious controversy over a number of basic issues, even within the scientific community. Recently, more than 40 atmospheric scientists in the United States jointly issued a strongly worded statement expressing their utmost unease at some of the UN-HABITAT guidelines based on “extremely immature scientific theories.” Speaking on the statement, the chief editor of Science and Environmental Policy Forecasting said that many of the world's