ECOSYSTEM'S OCCUPATION OF DIFFERENT COUNTRIES VIEWING FROM ECOLOGICAL FOOTPRINT
用生态足迹方法分析不同国家的资源消耗，发现发达国家占用更多生态系统并对其他国家造成生态威胁，可用于碳排放分配和资源侵占评估。
As a new method for quantitatively measuring natural resources use by human kind, ecological footprint can illustrate regional sustainable development through the analysis of energy and other resources consumption. Since the early 1990s when ecological footprint was first proposed by some Canadian eco-economists, it has been used in evaluating regional sustainability, calculating regional ecological capital and other fields. In this paper, after intruding the concept and principles, the authors used and analyzed the calculated results in some references, ecological footprints, bio-productive capacities and ecological surplus or deficit. The results show that developed countries or regions have more ecological footprint, occupy more ecosystems and have more ecological threats on other countries than developing countries. For example, the ecological appropriation is about per capita 10.9 hm~2 in USA which is the highest all over the world and the 2.4 times of the world average. The total footprint is 2901.7×10~4 hm~2 in USA which is also the highest in the world. Therefore, ecological footprint can reflect the consumption degree to natural resources. The more the ecological footprint is in some country or region, the more the natural resources used in the country or region and the more the potential influence of the country or region on others. The comparison between different countries or regions can illustrate the different contributions of different countries or regions to global change which has strongly been influenced by the consumption of natural resources and appropriation of ecological systems. Therefore, this method can be used in assessing the assignments of carbon emission and other related issues and resources and ecological aggression existed in the real world.