it refers to the quantity of earth and water that would be necessary to sustain the current generations, taking into account all the material and energy resources spent by a determined population. To calculate the Ecological Footprint it is necessary to sum all the components that can cause environmental impacts, such as: fossil fuels’ related activities; arable land; pastures; forest; urbanized area. Portugal’s Ecological Footprint is 4,4 ha; and a biocapacity of 2,1 ha, which means, it would be necessary 2 planets to maintain the medium padron of consumption. Approximately 60% of the ecological footprint of Portugal is explained with the levels of carbon emissions.
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