At present, it is difficult and costly to measure directly greenhouse gas (GHG) emissions from the wastewater treatment system. Application of model will reduce measurement cost and quickly obtain the forecast data set of GHG emissions. This study developed a mathematical model for both steady and dynamic states to calculate GHG (CO2, CH4, and N2O) emissions from wastewater treatment systems for industrial paper processing. These models are constructed based on mass balance equations of species, including substrate balance equations, biomass balance equations for reactors of treatment systems, stoichiometric coefficiences of species in biochemical reactions and biological processes. The obtained equations were solved based on algorithm of Runge-Kutta and the model was programmed by MATLAB. Results of applying the model to calculate GHG emissions from the paper industrial wastewater treatment system at Bai Bang and Tan Mai plants are as follows: total GHG emissions and emission factor are 3,070.3 kgCO2-eq/day, 0.38 kgCO2- eq/m3, respectively for Bai Bang plant (8,000 m3/day) and 7,413.6 kgCO2-eq/day, 0.74 kgCO2- eq/m3, respectively for Tan Mai plant (10,000 m3/day). The research evaluated a number of influencing factors, such as temperature, flow rate of influent, and substrate concentrations, to GHG emissions at the Tan Mai paper plant. / Hiện nay, việc đo đạc trực tiếp phát thải khí nhà kính (KNK) từ hệ thống xử lý nước thải còn khó khăn và tốn kém. Việc áp dụng mô hình sẽ giảm được chi phí đo đạc và nhanh chóng có được bộ số liệu dự báo một cách tương đối về phát thải KNK. Nghiên cứu đã thiết lập được mô hình toán ở trạng thái ổn định và trạng thái không ổn định để tính toán phát thải khí nhà kính (CO2, CH4, N2O) từ hệ thống xử lý nước thải sản xuất giấy. Các mô hình này dựa trên các phương trình cân bằng chất của các cấu tử bao gồm các phương trình cân bằng cơ chất, các phương trình cân bằng sinh khối trong các bể phản ứng và các hệ số tỷ lượng của các chất tham gia các phản ứng sinh hóa. Các phương trình được giải bằng thuật toán Runge-Kutta và mô hình được lập trình trên ngôn ngữ MATLAB. Mô hình được áp dụng tính toán phát thải khí nhà kính từ hệ thống xử lý nước thải tại nhà máy giấy Bãi Bằng và nhà máy giấy Tân Mai, được kết quả như sau: tổng phát thải khí nhà kính (KNK) và hệ số phát thải là 3.070,3 kg CO2-tđ/ngày, 0,38 kg CO2-tđ/m3 tại Nhà máy giấy Bãi Bằng (8.000 m3/ngày) và 7.413,6 kg CO2-tđ/ngày, 0,74 kg CO2-tđ/m3 nhà máy giấy Tân Mai (10.000 m3/ngày). Nghiên cứu đã đánh giá được một số các yếu tố ảnh hưởng như nhiệt độ, lưu lượng nước thải và nồng độ cơ chất dòng vào đến sự phát thải KNK tại nhà máy giấy Tân Mai.

Em um período de mudanças climáticas e restrições a emissões cada vez maiores, é importante focar o desenvolvimento das nações na direção de uma economia de baixo carbono. O elevado consumo de combustíveis fósseis gera danos que atingem escalas globais, regionais e locais e põem em risco o suprimento de longo prazo no planeta. O presente trabalho tem como objetivo analisar o desempenho dos principais setores industriais brasileiros considerando seus respectivos consumos energéticos e contribuições para aspectos sociais e econômicos do país. Além disso, busca-se mensurar os benefícios ambientais, no que diz respeito à emissão de CO2, resultante da alteração de energéticos nos setores industriais de menor desempenho e discutir políticas públicas que visam estimular a utilização de fontes de energia mais limpas. Para atingir o objetivo proposto, foi realizada a análise e quantificação da potencial contribuição ambiental que a alteração da matriz energética dos setores com menor desempenho em relação à sua contribuição para o desenvolvimento sustentável, pode fornecer. Para determinar o desempenho dos setores foi utilizada a Análise Envoltória de Dados (DEA). Os resultados deste estudo indicaram que o setor metalúrgico e o setor de não metálicos são os que possuem o menor desempenho, considerando as variáveis selecionadas. Já para medir as emissões de CO2 dos principais combustíveis utilizados nos setores de menor desempenho foi utilizado o método Top-Down proposto pelo IPCC. A análise indicou que, apesar do carvão vegetal ser o segundo emissor de CO2, ele pode contribuir para a redução do aquecimento global, desde que seja proveniente de mata de reflorestamento destinada para a atividade industrial. Por fim, foi realizada uma breve discussão sobre as políticas públicas voltadas a este energético. / In a period of climate change and of an increasingly restriction of emissions, it is pivotal to focus on a development by countries towards an economy revolved on low carbon dioxide levels. The high consumption of fossil fuels results in damages on a global, regional and local level threatening long-term supply in our planet. This work has as its objective to analyze the performance of the main Brazilian industrial sectors considering their energy consumption and contributions to social and economic aspects of the country. In addition, will be measure the environmental benefits, in terms of CO2 emissions, resulting from fuel substitution in the industrial sectors of lower performance and discuss public policies aimed at stimulating the use of cleaner energy sources. So as to achieve this objective, an analysis and measurement assertion of the potential environmental contribution that a change of the energy matrix, of the sectors with lower performance as regards to its contribution to sustainable development of the country, may provide was performed. Data Envelopment Analysis (DEA) was used to determine the efficiency of the sectors. The results of this study indicated that the metallurgical and nonmetallic sectors are the ones that have the lowest performance industrial in terms of sustainable. For the measurement of CO2 emissions for each major fuel used in the sectors with lower performance, the Top-Down method proposed by the IPCC was used. This analysis indicated that, although charcoal is the second fuel in sectors that emit more CO2, it can contribute to the reduction of global warming since it comes from forest reforestation destined for the activity industrial. Finally, a brief discussion about public policies on this fuel was held.

Les tourbières représentent 2 à 3% des terres émergées et stockent entre 10 et 25% du carbone des sols. Les tourbières sont soumises à des contraintes anthropiques et climatiques importantes qui posent la question de la pérennité de leur fonctionnement en puits de C et de leur stock. Une meilleure compréhension de ces écosystèmes est nécessaire pour déterminer les facteurs et les effets et interactions de ces facteurs sur les émissions de gaz à effet de serre (GES). Ce travail a consisté à suivre les émissions de GES et les facteurs contrôlant dans La tourbière de La Guette (Sologne) pour établir son bilan de C. En parallèle des expérimentations sur l’effet de l’hydrologie sur les flux ont été menées, enfin un suivi sur 4 sites a été réalisé pour étudier la variabilité à l’échelle journalière. Les résultats de ces travaux montrent que la tourbière de La Guette a fonctionné en source de C (-220 ± 33 gC m-2 an-1) et ce malgré un niveau de nappe élevé. Ils montrent également l’importance de la variabilité spatiale des flux estimés à l’échelle d’un site. Les expérimentations confirment l’importance de l’hydrologie et suggèrent à haut niveau de nappe d’eau des phénomènes liés au transport des gaz. Enfin l’étude de la variabilité journalière montre que la sensibilité de la respiration à la température peut être différente le jour et la nuit et que la synchronisation entre les températures du sol et la respiration peuvent améliorer la représentation de cette dernière. / Peatlands cover only 2 to 3% of the land area but store between 10 and 25% of the soil carbon. The outcome of the anthropic and climatic pressure on these ecosystems is uncertain regarding their functions and storage. A better understanding of these ecosystems is needed to determine the factors and their interactions on greenhouse gas (GHG) emission. This work consist in monitoring GHG emissions and controlling factors in a Sphagnum peatland to estimate its carbon balance. Experimentation on mesocosms were carried out to explore the effect of hydrology on the fluxes and a monitoring on 4 sites was made to study the daily variability. Results show that La Guette peatland was a carbon source (-220 ± 33 gC m-2 an-1) in spite of the high water table level. The importance of the spatial variability measured in the site was also demonstrate. The hydrology effect was confirmed by the mesocosms experiments and high water table level shows that gas transport might have an effect. Finally the study of the daily variability show that the temperature sensitivity of the respiration might be different between day and night and that synchronizing soil temperatures and respiration can improve the respiration representation.

The article reviews the experiences of programs to promote renewable energy in Southeast Asian countries and proposes some learned lessons that can be useful in the context of COP 20 to promote renewable energy.The article analyzes the rates and mechanisms of promotion used in countries such as India, Indonesia and Vietnam, that are led by the World Bank. These mechanisms are used as a legal basis that proposes successful tested alternatives and its usefulness is that renewable energies can be implemented within the current legal structure of international environmental law.In conclusion, it is the correct timing for the COP 20 to secure funds and international legal mechanisms that promote sustainable energy infrastructure. / El presente artículo revisa las experiencias de programas de promoción de energías renovables en países del sudeste asiático a fin de proponer algunas lecciones aprendidas que puedan ser útiles en el contexto de la Vigésima Conferencia de las Partes de la Convención Marco de las Naciones Unidas sobre el Cambio Climático (COP 20) para la promoción de las energías renovables. Asimismo, revisa las tarifas y mecanismos de promoción utilizados en India, Indonesia y Vietnam, impulsados por el Banco Mundial, como una base para proponer alternativas legales ya probadas. Su utilidad es que las energías renovables pueden ser implementadas dentro de la estructura legal actual del Derecho Ambiental Internacional, la COP 20 es el momento de asegurar fondos y mecanismos jurídicos internacionales que promueven una infraestructura energética sostenible.

Em um período de mudanças climáticas e restrições a emissões cada vez maiores, é importante focar o desenvolvimento das nações na direção de uma economia de baixo carbono. O elevado consumo de combustíveis fósseis gera danos que atingem escalas globais, regionais e locais e põem em risco o suprimento de longo prazo no planeta. O presente trabalho tem como objetivo analisar o desempenho dos principais setores industriais brasileiros considerando seus respectivos consumos energéticos e contribuições para aspectos sociais e econômicos do país. Além disso, busca-se mensurar os benefícios ambientais, no que diz respeito à emissão de CO2, resultante da alteração de energéticos nos setores industriais de menor desempenho e discutir políticas públicas que visam estimular a utilização de fontes de energia mais limpas. Para atingir o objetivo proposto, foi realizada a análise e quantificação da potencial contribuição ambiental que a alteração da matriz energética dos setores com menor desempenho em relação à sua contribuição para o desenvolvimento sustentável, pode fornecer. Para determinar o desempenho dos setores foi utilizada a Análise Envoltória de Dados (DEA). Os resultados deste estudo indicaram que o setor metalúrgico e o setor de não metálicos são os que possuem o menor desempenho, considerando as variáveis selecionadas. Já para medir as emissões de CO2 dos principais combustíveis utilizados nos setores de menor desempenho foi utilizado o método Top-Down proposto pelo IPCC. A análise indicou que, apesar do carvão vegetal ser o segundo emissor de CO2, ele pode contribuir para a redução do aquecimento global, desde que seja proveniente de mata de reflorestamento destinada para a atividade industrial. Por fim, foi realizada uma breve discussão sobre as políticas públicas voltadas a este energético. / In a period of climate change and of an increasingly restriction of emissions, it is pivotal to focus on a development by countries towards an economy revolved on low carbon dioxide levels. The high consumption of fossil fuels results in damages on a global, regional and local level threatening long-term supply in our planet. This work has as its objective to analyze the performance of the main Brazilian industrial sectors considering their energy consumption and contributions to social and economic aspects of the country. In addition, will be measure the environmental benefits, in terms of CO2 emissions, resulting from fuel substitution in the industrial sectors of lower performance and discuss public policies aimed at stimulating the use of cleaner energy sources. So as to achieve this objective, an analysis and measurement assertion of the potential environmental contribution that a change of the energy matrix, of the sectors with lower performance as regards to its contribution to sustainable development of the country, may provide was performed. Data Envelopment Analysis (DEA) was used to determine the efficiency of the sectors. The results of this study indicated that the metallurgical and nonmetallic sectors are the ones that have the lowest performance industrial in terms of sustainable. For the measurement of CO2 emissions for each major fuel used in the sectors with lower performance, the Top-Down method proposed by the IPCC was used. This analysis indicated that, although charcoal is the second fuel in sectors that emit more CO2, it can contribute to the reduction of global warming since it comes from forest reforestation destined for the activity industrial. Finally, a brief discussion about public policies on this fuel was held.

[ES] El calentamiento global, y el cambio climático (CC) que produce, es una de las amenazas más globales y urgentes de las que es responsable la humanidad. El desafío de mitigar y adaptarse a la CC, entre otros, es una responsabilidad que ha alcanzado a todas las disciplinas, incluyendo el proceso de investigación e innovación. Durante más de 10 años, y como una forma de abordar estos grandes desafíos de nuestro tiempo, con la intención de fomentar la investigación responsable, la Comisión Europea ha estado promoviendo una temática transversal llamada: "Investigación e innovación responsable (RRI, en sus siglas en inglés)". El objetivo es sacar a la luz los problemas relacionados con la investigación y la innovación, anticipar sus consecuencias y hacer participar a la sociedad en el debate sobre la forma en que la ciencia y la tecnología pueden contribuir a crear el tipo de mundo y de sociedad que deseamos para las generaciones futuras. Esta tesis surge como un puente entre el gran desafío que representa el CC y la demanda por parte de la sociedad de investigación e innovación responsable, abordada en el contexto de la RRI. Los financiadores e impulsores de la investigación y la sociedad en su conjunto esperan que los equipos de investigación e innovación proporcionen resultados socialmente deseables, éticamente aceptables y sostenibles. Por lo tanto, la pregunta general que se responde en esta tesis es: ¿cómo sabe un equipo de investigación, sin ser especialista en evaluación ambiental, si su investigación es responsable de emisiones contribuyentes al cambio climático, y cómo puede incluir medidas para reducir o compensar esas emisiones de gases de efecto invernadero (GEI)? Para responder a esta pregunta, la presente tesis doctoral inicia con la descripción de los principales fundamentos que son centrales en ella: CC y RRI. En lo que respecta al primer concepto, explicamos la importancia y los medios para calcular la contribución al CC, principalmente el enfoque de la Huella de Carbono. En lo que respecta al segundo concepto, se explica la alineación de esta tesis el área clave de la sostenibilidad ambiental de la RRI, sus marcos sustantivos y sus dimensiones de anticipación y reflexividad. Una vez establecidos estos dos fundamentos, el cambio climático se aborda en el contexto de la RRI, revisando la literatura sobre los proyectos y propuestas de la RRI, incluyendo la sostenibilidad ambiental, y el CC en particular. Como resultado, surgieron dos avenidas de investigación, que se desarrollan en las siguientes secciones. Una avenida sobre cómo evaluar la influencia de las partes interesadas en un proyecto de investigación en el contexto de la RRI, desarrollada en el capítulo 3, y una avenida sobre la necesidad de nuevas herramientas basadas en bases de datos de acceso abierto para ayudar a los profesionales a integrar la prevención del CC en sus actividades de I + D. El capítulo 4, presenta el diseño de una novedosa herramienta con un algoritmo didáctico para la medición anticipada de la huella de carbono en los proyectos de investigación e innovación. Esta herramienta permite a los investigadores que no tienen formación en evaluación del impacto ambiental estimar las emisiones de gases de efecto invernadero de sus proyectos de investigación e innovación en las primeras etapas, momento en el que la anticipación y la reflexividad son las dimensiones fundamentales de la RRI. / [CA] L'escalfament global, i el canvi climàtic (CC) que produeix, és una de les amenaces més globals i urgents de les que és responsable la humanitat. El desafiament de mitigar i adaptar-se a la CC, entre d'altres, és una responsabilitat que ha arribat a totes les disciplines, incloent el procés de recerca i innovació. Durant més de 10 anys, i com una forma d'abordar aquests grans desafiaments del nostre temps, amb la intenció de fomentar la investigació responsable, la Comissió Europea ha estat promovent una temàtica transversal anomenada: "Recerca i innovació responsable (RRI, en seves sigles en anglès)". L'objectiu és treure a la llum els problemes relacionats amb la investigació i la innovació, anticipar les seves conseqüències i fer participar la societat en el debat sobre la forma en què la ciència i la tecnologia poden contribuir a crear el tipus de món i de societat que desitgem per a les generacions futures. Aquesta tesi sorgeix com un pont entre el gran desafiament que representa el CC i la demanda per part de la societat d'investigació i innovació responsable, abordada en el context de la RRI. Els finançadors i impulsors de la investigació i la societat en el seu conjunt esperen que els equips de recerca i innovació proporcionin resultats socialment desitjables, èticament acceptables i sostenibles. Per tant, la pregunta general que respon a aquesta tesi és: com sap un equip d'investigació, sense ser especialista en avaluació ambiental, si la seva investigació és responsable d'emissions contribuents a el canvi climàtic, i com pot incloure mesures per reduir o compensar aquestes emissions de gasos d'efecte hivernacle (GEH)? Per respondre a aquesta pregunta, la present tesi doctoral s'inicia amb la descripció dels principals fonaments que són centrals en ella CC i RRI. Pel que fa a el primer concepte, expliquem la importància i els mitjans per calcular la contribució a l'CC, principalment l'enfocament de la Petjada de Carboni. Pel que fa a el segon concepte, s'explica l'alineació d'aquesta tesi l'àrea clau de la sostenibilitat ambiental de la RRI, els seus marcs substantius i les seves dimensions d'anticipació i reflexivitat. Un cop establerts aquests dos fonaments, el canvi climàtic s'aborda en el context de la RRI, revisant la literatura sobre els projectes i propostes de la RRI, incloent la sostenibilitat ambiental, i el CC en particular. Com a resultat, van sorgir dues avingudes de recerca, que es desenvolupen en les següents seccions. Una avinguda sobre com avaluar la influència de les parts interessades en un projecte d'investigació en el context de la RRI, desenvolupada en el capítol 3, i una avinguda sobre la necessitat de noves eines basades en bases de dades d'accés obert per ajudar els professionals a integrar la prevenció de CC en les seves activitats d'R + d. El capítol 4, presenta el disseny d'una nova eina amb un algoritme didàctic per al mesurament anticipada de la petjada de carboni en els projectes de recerca i innovació. Aquesta eina permet als investigadors que no tenen formació en avaluació de l'impacte ambiental estimar les emissions de gasos d'efecte hivernacle dels seus projectes de recerca i innovació en les primeres etapes, moment en el qual l'anticipació i la reflexivitat són les dimensions fonamentals de la RRI. / [EN] Global Warming, and the climate change (CC) it produces, is one of the most global and urgent threats humankinds is responsible for. The challenge of mitigating and adapting to CC, among others, is a responsibility that has reached all disciplines, including the research and innovation (R&I) process. For more than 10 years, and as a way to tackle these great challenges of our time, with the intention of fostering responsible research, the European Commission has been promoting a cross-cutting issue named: "Responsible Research and Innovation (RRI)". The aim is to bring the problems (such as research integrity, non-inclusion of stakeholders, application of ethical or sustainability principles, etc.,.) related to R&I to light, to anticipate the possible consequences of R&I process and outcomes, and to engage society in the discussion of how science and technology can help create the kind of world and society we want for generations to come. This thesis emerges as a bridge between the great challenge represented by CC and the demand for responsibility from R&I process and outcomes, addressed in the context of RRI. Research funders and society as a whole claim that R&I teams must provide socially desirable, ethically acceptable, and sustainable outcomes. Hence, the general question to be answered in this thesis is: how does a research team, while not being specialists, know if its research is responsible for relevant contributions to CC, and how can they include measures to reduce or compensate such contributions (Greenhouse Gas emissions, GHG)? To respond to this question, the present dissertation begins with the main foundations that are central to it: CC and RRI. As regards the former concept, we explain the importance and means to calculate the contribution of GHG to CC, mainly the carbon footprint approach. In addition, regarding the latter, how this thesis aligns with the key RRIs' area of environmental sustainability, its substantive frameworks and its anticipation and reflexivity dimensions. Once these two foundations are established, CC is addressed in the context of RRI, reviewing the literature on RRI projects and proposals, which include environmental sustainability, and CC in particular. As a result, two avenues of research arise, which are developed in the following sections. An avenue about how to assess the stakeholders' influence in a research project within the context of RRI, which is developed in chapter 3, and an avenue about the need for new tools based on open-access databases to help practitioners to integrate CC prevention in their R&I activities. Chapter 4 presents the design of a novel tool with a didactic algorithm for anticipatory carbon footprint measuring in R&I projects. This tool allows researchers who are untrained in environmental impact assessment to estimate the greenhouse gas emissions of their R&I projects at early stages, when anticipation and reflexivity are the core RRI dimensions. / Ligardo Herrera, IE. (2021). Addressing Climate Change in Research and Innovation Projects. A Tool for Anticipatory Carbon Footprint Calculation [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/165867 / TESIS

Methane (CH4) is guaranteed to affect climate change and is essential in rising temperatures. Scientists have known for over two decades that wetlands emit CH4 to such an extent that it affects our climate. Tropical trees that grow in wetlands tend to emit or act as a conduit of CH4, to the extent that it has a negative environmental impact. However, until this study, no one has examined whether wetland species growing in another environment have the same effects. Hence, this thesis aimed to collect data from wetland-adapted tropical trees in a non-wetland environment, namely the Botanical Garden in Rio de Janeiro. The results showed a difference in the sampling height of the stem, namely that a decrease in emission is seen with an increased height. All the species except one (Pseudobombax munguba) showed both assimilation and emission from the day-to-day measurements of CH4, which speaks for the trees acting both as a sink and a source of CH4. This suggests that the species are more robust than the environmental stressors in a non-wetland environment. Previous studies have found that increased CH4 emissions can be seen with different meteorological parameters. The results presented in this thesis show the opposite, that some species tend to emit less or assimilate more CH4 during days with increased rainfall, humidity, and temperature.

The study focussed on the research question namely: “How will the introduction of new ecological taxes impact the South African agricultural sector?” To answer the question, eight international eco-taxes were selected and further investigated. The nature and history of each eco-tax was examined. The effects or expected effects (where implementation have not yet taken place) of the eco-taxes on the agricultural sectors of the foreign countries, were then considered. The study continued by considering the possible impact on South African agriculture, should these taxes be implemented in South Africa. This was accomplished by extrapolating the foreign effects previously investigated. Mindful of findings, recommendations were then made of what eco-taxes could be implemented which will not impede South African agriculture. It was concluded that the British Climate Change Levy and Climate Change Agreement scheme, Australian Carbon Farming Initiative and Swedish meat consumption tax could be considered for implementation. / Financial Accounting / M. Phil (Accounting Science)

[pt] A dissertação faz uma análise do Programa Nacional de Produção e Uso do Biodiesel (PNPB), criado em 2005, que introduziu na matriz energética brasileira o biodiesel, um combustível renovável e orgânico, que pode ser produzido a partir de óleos vegetais, gorduras de animais e óleos residuais de frituras. O PNPB estabeleceu a adição do biodiesel ao diesel fóssil de forma gradual e parcial, cujo teor deverá alcançar 15 por cento em 2026. O PNPB é analisado com base nos três pilares da sustentabilidade, considerando os aspectos econômicos, sociais e ambientais. Na economia, apesar dos custos do biodiesel serem maiores que os do diesel fóssil, o PNPB vem contribuindo para reduzir a sua importação, melhorando o saldo da balança comercial. Na questão ambiental, o biodiesel, ao substituir parcialmente o consumo de diesel, contribui para a descarbonização do setor de transporte e para que o Brasil cumpra seu objetivo de redução de emissões, determinado no Acordo de Paris (2015), uma vez que o biodiesel emite cerca de 70 por cento menos GEE, em relação ao diesel fóssil. No aspecto social, embora não tenha cumprido o objetivo original de priorizar a agricultura familiar do Norte e Nordeste, o PNPB instituiu desonerações fiscais através do Selo Biocombustível Social aos produtores de biodiesel que adquirissem matérias-primas da agricultura familiar, fomentando a inclusão social, a geração de trabalho e renda no campo e o desenvolvimento regional. Desse modo, o PNPB contribui para os Objetivos de Desenvolvimento Sustentável (ODS), que englobam metas ambientais, econômicas e sociais, que deverão ser cumpridas até 2030. A dissertação também analisa se há competição relevante pelo uso da terra entre a produção de biodiesel e as terras reservadas à conservação ambiental ou utilizadas na produção de alimentos. Por fim, são analisados diferentes cenários tendenciais de produção e uso do biodiesel e biocombustíveis no Brasil, em um contexto em que os veículos elétricos tendem a ser cada vez mais disseminados, mas com intensidade menor no caso dos veículos pesados (caminhões e ônibus) e nos países em desenvolvimento. / [en] The dissertation analyzes the National Program for the Production and Use of Biodiesel (PNPB), created in 2005, which introduced biodiesel into the Brazilian energy matrix, a renewable and organic fuel that can be produced from vegetable oils, animal fats and used cooking oil. The PNPB established the gradual and partial addition of biodiesel to fossil diesel, whose content should reach 15 percent in 2026. The PNPB was analyzed based on the three pillars of sustainability, considering the economic, social and environmental aspects. In the economy, despite the higher costs of biodiesel than diesel, the PNPB has contributed to reducing diesel imports, improving the trade balance. On the environmental side, biodiesel contributes to the decarbonization of the transport sector by partly replacing diesel consumption. It also helps Brazil to meet its Paris Agreement emission reduction objectives, since biodiesel emits about 70 percent less GHG than fossil diesel. In terms of social contribution, even though it did not fulfill its original objective to prioritize family farming in the North and Northeast, the PNPB instituted tax breaks for biodiesel producers who purchase raw materials from family farmers through the Social Biofuel Certificate, fostering social inclusion, the generation of jobs and income in the countryside and regional development. In this way, the PNPB contributes to the Sustainable Development Goals (SDGs), which include environmental, economic and social goals, which must be met by 2030. The dissertation also analyzes whether there is relevant land use competition between the production of biodiesel with land reserved for environmental conservation or used in food production. Finally, different future scenarios of production and use of biodiesel and biofuels in Brazil are analyzed, in a context in which electric vehicles tend to be increasingly widespread, but with lower intensity in the case of heavy vehicles (trucks and buses) and in developing countries.