A study used computer modeling to simulate global carbon trading and its impact on the environment. The researchers found that the success of carbon trading depends on how emission quotas are allocated. Developed countries may face quota deficits due to their past emissions. As global demand for carbon emissions increases, the price of carbon will also rise. Carbon trading helps transfer money from developed to developing countries. Developed countries buy emission quotas from developing countries, leading to higher per capita emissions in developed nations. Overall, carbon trading increases global utility.