众所周知,美国政府在防止全球变暖协议问题上一直态度不明朗,是诸工业发达国家中唯一不愿保证将主要温室气体——二氧化碳排放量在2000年稳定在1990年排放水平上的国家。其主要原因,是担心对环保责任的承诺会给美国带来额外负担或会阻碍美国经济的发展。布什在赴巴西联合国环境与发展大会的犹 As we all know, the U.S. government has always been unclear about preventing the issue of global warming, and it is the only country among developed countries that is unwilling to guarantee the stabilization of its main greenhouse gas, carbon dioxide emissions, in 1990 at 1990 levels. The main reason is that the commitment to environmental responsibility will bring additional burden to the United States or hinder the development of the United States economy. Bush goes to the United Nations Conference on Environment and Development in Brazil