The relationship between income levels and pollution, which is as fast. Their teacher, found that while the economy grows, as well as the income level that pollution levels are still high. At the 1992 United Nations Earth Summit Conference in Rio de. Janeiro has succeeded in reducing carbon emissions, but the United States has refused to sign the agreement. In addition, the rate of carbon emissions, America is staggering. Free trade supporters proposed a free trade agreement with the severe operating environment and labor laws in developing countries with legislation of environmental protection.
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