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in sustainable development, and we should use trade measures to further protect the environment, but not use environmental measures to restrict trade. They argue that as countries developing, they spend more on environmental controls and so tend to pollute less than they did when they were less advanced economically.4 The changed attitude of the developed countries is the best example. It is the same to the developing countries. China has 1.3 billion people living in the limited territory. In the past, peasants had to destroy plenty of forest and grassland for cultivating to support so many people. Now, some of these peasants are encouraged to give up cultivating and to plant more trees and grasses because China central government promises to provide free food to them. And it was also reported that between 1998 and the end of 2000, China's central government would have spent a total of RMB 27 billions(US$3.26 billions) for ecological and environmental project.5 It is incredible and unprecedented in China's history. So countries especially developing countries argue that economic growth and trade liberalization have a positive role to play in the achievement of sustainable development. And an open, equitable and non-discriminatory multinational trading system has a key contribution to make to national and international efforts to better protection and conserve environmental resources and promote sustainable development. Further liberalization of international trade has a crucial role to play in order to generate revenue that can be devoted to environmental protection, to allow for a more efficient allocation of environmental resources and for the removal of trade restrictive policies. It is also argued that trade restrictions are neither the only nor necessary policy instruments to use in multilateral environmental agreements. It is also stated in Principle 21 of the Rio Declaration that "unilateral measures should be avoided as far as possible". There is no doubt that the developing countries are the initiators and supporters of above-said opinions. The developing countries are also concerned with the attitude of the developed countries. The developing countries argue that developed countries are seem to be more concerned with environment, but actually not, because they consume more energy and thus cause more pollution, but they are unwilling to reduce energy consuming. It seems that they are more concerned with promoting environmental protection, but actually not, because environment standards they use are not always for environmental protection, but for something else. The NAFTA6 is a good example, what the US labour unions wanted to do was that they want to prevent the loss of job to lower-cost Mexico. It seems that they are more concerned with environment of the whole world, but actually not, because they export goods that are domestically prohibited in their own territory to the developing countries, they even export hazardous and other wastes to the developing countries. It seems that they are more concerned with environment of the whole world, but actually not, because they are more powerful, they use the carrot and the stick to raise environmental standards, but they are miserly in finance and technology assistance. The developing countries are left to be lack of information and technology to change their production methods to meet the environmental standards. However, on the other hand, many environmentalists a