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The major amtrihtitor to global wanning is considered to he the high levels of greenhouse gas emissions, especially carbon dioxide (COJ, caused by the burtiing of fossil fuel. Thus, to mitigate CO^ emissions, renewable energy sources such as ethanol have been seen as a promising alternative to fossil fuel consumption. Brazil was the world's first nation to run a large-scale program for using ethanol as fuel. Eventually, the United States also developed large-scale production of ethanol. In this study, we compare the benefits and environmental impacts of elhanol fuel, in Brazil and in the United States, using the ecological footprint tool developed hy Wackernagel and Rees. We applied the STELLA model to gauge possible outcomes as a function of variations in the ethanol production scenario.

Ethanol as Fuel: Energy, Carbon Dioxide Balances, and Ecological Footprint