In the recent years، increasing of Green House Gases، degradation of environment، deforestation alongside with the limitation and decreasing of ecological foot print of the earth for supplementation of human needs are the main problems of the world. The Carbon Dioxide gas as a main factor of world climate change، carry out the 60 percent of the global heating or greenhouse effect. The main source of the carbon dioxide is the oil and its products which used for the production of power in the urban and rural areas. The over use of these energy sources lead to ecological and environmental problems. The researches show that the forestry and greenery is one of the suitable ways to dealt with the green house problems. The aim of this research is to calculate the amount of Green Space for the absorption of the co2 resulted from fossil fuels. In doing this، we used IPCC method of prediction as a methodological tool. Though one of the municipals duties is about the urban forest and green area، this article wants to investigate the Ecological foot print of fuel energy sources in the city of Shiraz in Iran. This research showed that the EF for the fuel energy sources in Shiraz was about 7352 hectare. This means that we need 7352 hectare forest to keep the environment in equal condition. But the fact is this that the green space of per capita in Shiraz must be about 51.78 m2، which means that the municipal must add another 38.61 m2 of green space per capita to the current rate. Also this research emphasized that a real calculation of per capita green space، in an urban area، must take advantages of the EF. Having the results the municipality of the Shiraz must take a serious strategy for dealing with the current environmental crises.