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L\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span>Studies aim to deepen knowledge of alternative energy sourcesL\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span><\/p><\/div>\n Correlations between energy crises and hunger first began to be studied in the 1970s, but the idea of a link between water, energy, and food was established as a research methodology in 2008 at the World Economic Forum in Davos, Switzerland. Economists gathered at the event to discuss potential solutions to water security problems and alternative energy sources as a way to reduce the use of fossil fuels. Initially encompassed by research in the natural sciences, engineering, and economics, the scope of the topic was amplified based on an article by Holger Hoff, an environmental scientist from the Potsdam Institute for Climate Impact Research and the Stockholm Environment Institute in Sweden, presented during the conference in Bonn. \u201cHoff suggested analyzing the management of these three elements together, in addition to drawing attention to the relationships between them and situations of poverty and vulnerability,\u201d explains Leandro Luiz Giatti, a biologist from the School of Public Health at the University of S\u00e3o Paulo (FSP-USP). According to Giatti, Hoff’s ideas were adopted by researchers from fields such as geography and the social sciences, who began working together with engineers and biologists in the search for integrated solutions to energy, water, and food security management.<\/p>\n Brazilian scientists, many with funding from FAPESP, are on the front line of this process, having aligned themselves with institutions from all over the world in the last 10 years to analyze how the concept of this nexus can contribute to research in developing countries. Gabriela Marques Di Giulio, a professor at FSP-USP, is one such researcher. According to her, the approach has gained traction in the country in studies of the biofuel sector. \u201cAs well as using natural resources more sustainably through strategies that balance the use of land for sugarcane and food production for example, in Brazil the nexus can also serve as a foundation for debates about the climate crisis, preserving biodiversity, food security, and reducing poverty,\u201d she says.<\/p>\n Giatti offers another example. He recalls that during water crises in S\u00e3o Paulo, the state government has invested in capturing water from farther away, such as the Cantareira system, which captures water from springs in the state of Minas Gerais to supply the S\u00e3o Paulo Metropolitan Area. \u201cBringing water from so far away requires more energy and tends to lead to conflicts with other users of the same source. It can also end up benefiting some sectors more than others, such as industries that continue to use a regular volume of water even during shortages, while vulnerable populations in peripheral neighborhoods have to deal with severe rationing,\u201d he details. Although this type of problem has always existed, Giatti points out that the idea of the nexus provides new perspectives that can be used to overcome the challenges of interdependent scarcity.<\/p>\n L\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span>Farmer in Parelheiros, in the capital of S\u00e3o Paulo: the district offers potential for expanding arable areasL\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span><\/p><\/div>\n In a similar vein, Tadeu Fabr\u00edcio Malheiros, an engineer from the same institution, explains that most of research on the nexus has focused on economic themes related to hydroelectric plants and the biofuel sector. \u201cMeanwhile, studies that analyze the effects of urbanization on the three elements, for example, are still incipient,\u201d he says. He draws attention, for example, to the need to investigate impacts and solutions in vulnerabile urban areas and how they interface with water, energy, and food security.<\/p>\n The book The Water-Energy-Food Nexus \u2013 What the Brazilian Research Has to Say <\/em>(FSP-USP, 2022), published earlier this year based on research carried out by Malheiros, Di Giulio, other FSP-USP scholars, and specialists from Austria, Germany, South Africa, Switzerland, the Netherlands, and the USA, presents case studies that have utilized the new concept to deal with challenges in urban areas, semiarid zones, the Amazon, and the Atlantic Forest.<\/p>\n L\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span>Hydroelectric plant on the Paranapanema River in Piraju, S\u00e3o Paulo. Studies on the nexus involve topics important to the economy, such as energy generationL\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span><\/p><\/div>\n Between 60% and 70% of the freshwater used worldwide is used for irrigated agriculture, a common practice in Brazil, where agricultural commodity exports are one of the country\u2019s economic foundations, says Maria do Carmo Sobral, an engineer from the Federal University of Pernambuco (UFPE). According to Sobral, more than 40% of Brazilian fruit exports in 2021 came from agricultural regions near the city of Petrolina in the state of Pernambuco, which use water from the S\u00e3o Francisco River. \u201cTo ensure that the aquatic ecosystem remains alive, especially in situations of crisis, there needs to be an environmentally balanced flow,\u201d she explains.<\/p>\n In 2019, Sobral began research on the integrated management of semiarid drainage basins in the context of climate change, during which she developed a case study based on the S\u00e3o Francisco River and analyzed how its water is used according to scenarios estimated by the Intergovernmental Panel on Climate Change (IPCC). \u201cThe river crosses seven states, which all depend on proper management of water resources to be able to meet their demands,\u201d she highlights. \u201cIn dry regions, like the Brazilian Northeast, rainfall occurs rarely, but when it does rain, it can be torrential,\u201d Sobral says. By way of an example, she cites the Recife Metropolitan Region, which in June recorded an entire month\u2019s forecast rainfall in a single day, causing floods, landslides, and deaths.<\/p>\n L\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span>Jacare\u00ed Reservoir, part of the Cantareira system in S\u00e3o Paulo, during the dry seasonL\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span><\/p><\/div>\n Considering the scenarios designed by the IPCC, one of the guidelines raised by Sobral’s study is the need to create flexible strategies in water management. She points out that current environmental control processes are static and use licenses that are often 5\u201315 years long to regulate water capture from drainage basins. \u201cWe need a more efficient approach to environmental management that can be adjusted according to the river\u2019s flow rate, considering situations of water surplus or scarcity,\u201d she argues. Information on the need to create flexible strategies can be utilized by institutions such as the National Water Agency (ANA), the Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA), and the S\u00e3o Francisco Bay Committee.<\/p>\n Another case study analyzed in the FSP-USP book is the south zone of S\u00e3o Paulo, a city of about 2,200 square kilometers (km2<\/sup>) that is surrounded by areas of environmental significance. \u201cThe springs in the south supply 5.6 million people. This zone has great potential for expanding arable areas. Investments in preserving its designation for agricultural use represent an important strategy to prevent the loss of biodiversity and water resources throughout the city,\u201d says geographer Fabiano de Ara\u00fajo Moreira. In his recently completed postdoctoral research funded by FAPESP, Moreira created indicators to measure the benefits of the Ligue os Pontos<\/em> (\u201cConnect the Points\u201d) project, run by the Municipal Department of Urbanism and Licensing, designed to promote sustainable development in rural areas. According to the researcher, the program was initially evaluated based on indicators that only considered variations in the income of farmers and the number of rural properties. \u201cBut they didn\u2019t allow us to measure whether the program was actually improving the quality of life of people living in the rural areas surrounding southern S\u00e3o Paulo,\u201d she says.<\/p>\n Diogo Duarte\u2009\/\u2009Anadolu Agency via Getty Images<\/span>Aerial view of Recife in June, when a whole month\u2019s forecast rainfall fell in one dayDiogo Duarte\u2009\/\u2009Anadolu Agency via Getty Images<\/span><\/p><\/div>\n Based on the concept of the nexus, which encourages the pursuit of food production improvements without harming the surrounding water and energy systems, Moreira worked with representatives of the Department of Urbanism and Licensing, Casa da Agricultura Ecol\u00f3gica<\/em> in the district of Parelheiros, local environmental protection areas (EPAs), and farmers, to establish 34 indicators for assessing the effectiveness of Ligue os Pontos<\/em>. As a result, new elements were analyzed, such as the issue of agrochemical use on farms, the services available to farmers by the sanitation network, crop diversity, and the amount of water used, in addition to electricity consumption in homes and fuel consumption for transporting agricultural products. \u201cSome research areas use the nexus both to investigate and achieve greater efficiency and to reduce costs in the exploitation of natural resources. Studies in geography have used this approach to think about how to ensure vulnerable populations have access to these resources,\u201d says Moreira. She points out that another strategy geographers have taken is to reflect on the territorial implications of sector-specific actions, supported by the nexus. \u201cIllegal occupations near dams, for example, have repercussions throughout the municipality,\u201d she explains.<\/p>\n L\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span>Urban agriculture is considered important for promoting the nexus. The image shows a vegetable garden in the city of S\u00e3o PauloL\u00e9o Ramos Chaves\u2009\/\u2009Revista Pesquisa FAPESP<\/span><\/p><\/div>\n In another study funded by FAPESP, Rodrigo Augusto Bellezoni, an ecologist from the Getulio Vargas Foundation\u2019s School of Business Administration in S\u00e3o Paulo (EAESP-FGV), analyzed how urban forests, plazas, trees, green roofs, and rainfall capture mechanisms in eight cities around the world, including S\u00e3o Jos\u00e9 dos Campos and Florian\u00f3polis in Brazil, as well as municipalities in Africa, India, and Asia, affect the relationships between water, energy, and food systems. \u201cIn relation to these green systems in cities, the study identified urban agriculture as one of the most beneficial structures for promoting the water-energy-food security nexus, especially in the Global South, due to the positive effects on the three systems. If at least some food is produced near where it is consumed, the energy demand is lower, especially due to reduced transport requirements, as is the use of water, since urban farms and gardens are usually irrigated with rainwater,\u201d he says.<\/p>\n As an example of a public policy that promotes and preserves green infrastructure, he mentions Decree 61,143, established by the city of S\u00e3o Paulo in March with the objective of creating a payment program for the provision of environmental services in protected areas around springs in the city. Through this initiative, property owners are remunerated for investing in the maintenance, recovery, regeneration, and enrichment of forest fragments, springs, riparian forests, and permanent preservation areas. \u201cAs a result of S\u00e3o Paulo\u2019s initiative, S\u00e3o Jos\u00e9 dos Campos, a city in the state\u2019s interior, is considering creating a similar legal mechanism to recognize and compensate the work of people and organizations that provide environmental services,\u201d adds Bellezoni.<\/p>\n Projects Book<\/strong> Scientific article<\/strong>![\"\"](\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2022\/09\/082-085_nexo-agua_317-2-1140.jpg\")
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\n1.<\/strong> (Re)connect the nexus: Young Brazilians’ experiences of and learning about food-water-energy (n\u00ba 15\/50226-0<\/a>); Grant Mechanism <\/strong>Thematic Project; Agreement <\/strong>Confap; Newton Fund, with FAPESP as the partner institution in Brazil; ESRC, UKRI; Principal Investigator <\/strong>Jos\u00e9 Ant\u00f4nio Perrella Balestieri (UNESP); Investment <\/strong>R$620,527.33.
\n2.<\/strong> Resilience and vulnerability in relation to the urban nexus of food, water, energy, and the environment (ResNexus)<\/em> (n\u00ba 15\/50132-6<\/a>); Grant Mechanism <\/strong>Thematic Project; Agreement <\/strong>ESRC, UKRI; Dutch Research Council (NWO); Principal Investigator<\/strong> Leandro Luiz Giatti (USP); Investment <\/strong>R$1,081,327.37.
\n3.<\/strong> Globally and locally sustainable food-water-energy innovation in Urban Living Labs \u2013 Glocull (n\u00ba 17\/50423-6<\/a>); Grant Mechanism <\/strong>Regular Research Grant; Agreement <\/strong>Belmont Forum; Principal Investigators <\/strong>Tadeu Fabricio Malheiros & Gabriela Di Giulio (USP); Investment <\/strong>R$763,198.
\n4.<\/strong> Globally and locally sustainable food-water-energy innovations in Urban Living Laboratories \u2012 Glocull \u2012 indicators for assessing sustainability in integrated urban food\/water and energy projects (n\u00ba 18\/21249-0<\/a>); Grant Mechanism <\/strong>Postdoctoral Fellowship; Agreement <\/strong>Belmont Forum; Supervisors <\/strong>Tadeu Fabricio Malheiros & Gabriela Di Giulio (USP); Beneficiary <\/strong>Fabiano de Ara\u00fajo Moreira; Investment <\/strong>R$337,062.21.
\n5.<\/strong> Understanding innovative initiatives for governing food, water, and energy nexus in cities \u2013 IFWEN (n\u00ba 17\/50425-9<\/a> and 18\/20057-0<\/a>); Grant Mechanism <\/strong>Postdoctoral Fellowship; Agreement <\/strong>Belmont Forum and JPI Urban Europe as part of the Sustainable Urbanization Global Initiative (SUGI 11221480); Supervisor <\/strong>Jos\u00e9 Antonio Puppim de Oliveira (FGV); Beneficiary <\/strong>Rodrigo Augusto Bellezoni; Investment<\/strong> R$406,314.18.
\n6.<\/strong> Understanding innovative initiatives for governing food, water, and energy nexus in cities \u2013 IFWEN (n\u00ba 17\/50425-9); Grant Mechanism<\/strong> Regular Research Grant; Agreement <\/strong>Belmont Forum and JPI Urban Europe as part of the Sustainable Urbanization Global Initiative (SUGI 11221480); Supervisor & consortium leader <\/strong>Jos\u00e9 Antonio Puppim de Oliveira (FGV); Beneficiaries <\/strong>Rodrigo Augusto Bellezoni (n\u00ba 18\/20057-0), Laura S\u00edlvia Valente de Macedo (n\u00ba 18\/20160-6); Julio Cesar Zambrano Gutierrez (n\u00ba 20\/07136-9); Marc Barda Picavet (n\u00ba 18\/26505-5); Investment <\/strong>\u20ac1,309,831 (FAPESP, NSF, BMBF, Formas, Start, Most).<\/p>\n
\nMOREIRA, F. A.\u00a0et al<\/em>.\u00a0\u00a0The water, energy, and food security nexus \u2013 What the Brazilian research has to say.<\/a>\u00a0S\u00e3o Paulo: School of Public Health, USP, 2022.<\/p>\n
\nHOFF, H. Understanding the Nexus.\u00a0Background paper for the Bonn 2011 Nexus Conference:\u00a0The water, energy and food security nexus<\/a>.\u00a0Stockholm: Stockholm Environment Institute, 2011.<\/p>\n