The Impact of Factors Affecting Environmental Pollution with Emphasis on Trade Openness in Different Countries (Case study CO2 emission)

Urbanization، population growth and moving from traditional manufacturing industry to accelerate the process of economic development and parallel، significant environmental impacts are left. The purpose of this study is to investigate the effect of different variables such as trade openness، comparative advantage، production levels and other important variables affecting the emission of carbon dioxide gas in various countries of the world. Stata11 software was used to estimate the panel data model of 77 countries over the years 2010-1980. The results indicate that propagation environment، and in particular CO2، in all four groups of countries are associated with prior emission، with a per capita income direct link but with the square of it correlates inversely and have direct link with the ratio of capital to labor and with the square of it correlates inversely and trade openness in high-income countries and moderate negative effect in low-income and middle-income countries is directly related to the bottom.