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Sustainability 2017, 9(11), 2049;

Uncovering the Green, Blue, and Grey Water Footprint and Virtual Water of Biofuel Production in Brazil: A Nexus Perspective

Department of Geographical Sciences, University of Maryland, College Park, MD 20742, USA
Water & Sanitation Division, Inter-American Development Bank, Washington, DC 20057, USA
Department of Environmental Studies, Masaryk University, Brno 602 00, Czech Republic
International Institute for Applied Systems Analysis (IIASA), Laxenburg A-2361, Austria
Organization for Economic Co-operation and Development (OECD), 75775 Paris, France
Department of Economics, University of São Paulo, São Paulo 05508-020, Brazil
Department of Atmospheric and Oceanic Sciences, College Park, University of Maryland, College Park, MD 20742, USA
Author to whom correspondence should be addressed.
Received: 27 September 2017 / Revised: 29 October 2017 / Accepted: 30 October 2017 / Published: 8 November 2017
(This article belongs to the Special Issue Natural Resources Economics)
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Brazil plays a major role in the global biofuel economy as the world’s second largest producer and consumer and the largest exporter of ethanol. Its demand is expected to significantly increase in coming years, largely driven by national and international carbon mitigation targets. However, biofuel crops require significant amounts of water and land resources that could otherwise be used for the production of food, urban water supply, or energy generation. Given Brazil’s uneven spatial distribution of water resources among regions, a potential expansion of ethanol production will need to take into account regional or local water availability, as an increased water demand for irrigation would put further pressure on already water-scarce regions and compete with other users. By applying an environmentally extended multiregional input-output (MRIO) approach, we uncover the scarce water footprint and the interregional virtual water flows associated with sugarcane-derived biofuel production driven by domestic final consumption and international exports in 27 states in Brazil. Our results show that bio-ethanol is responsible for about one third of the total sugarcane water footprint besides sugar and other processed food production. We found that richer states such as São Paulo benefit by accruing a higher share of economic value added from exporting ethanol as part of global value chains while increasing water stress in poorer states through interregional trade. We also found that, in comparison with other crops, sugarcane has a comparative advantage when rainfed while showing a comparative disadvantage as an irrigated crop; a tradeoff to be considered when planning irrigation infrastructure and bioethanol production expansion. View Full-Text
Keywords: nexus; Brazil; bioenergy; water footprint; virtual water; water scarcity nexus; Brazil; bioenergy; water footprint; virtual water; water scarcity

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Munoz Castillo, R.; Feng, K.; Hubacek, K.; Sun, L.; Guilhoto, J.; Miralles-Wilhelm, F. Uncovering the Green, Blue, and Grey Water Footprint and Virtual Water of Biofuel Production in Brazil: A Nexus Perspective. Sustainability 2017, 9, 2049.

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