Many writers argue that free trade will lead to environmental degradation. Most environmentally pernicious Public policies, however, such as subsidies of timber extraction and ranching, are also trade protectionist policies. To the extent that free trade treaties, such as the General Agreement on Tariffs and Trade, do away with such trade protectionism, free trade instead could be viewed as a major pathway to environmental reform Furthermore, trade liberalization is associated with urbanization and industrialization, both of which reduce population growth rates and the pressures of colonization. I suggest that we, as environmentalists, can ally ourselves with free traders.