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Environmental tax reform (ETR), a shift from labour to carbon taxes, has been mostly modelled using general equilibrium (GE) analysis. Since a low-carbon transition will require deep transformations, one will also have to address out-of-equilibrium dynamics and increased agent heterogeneity. Unlike GE models, agent-based models (ABMs) are well equipped to deal with this. We therefore replicate a recent GE model for ETR using an agent-based approach. This process, known as "agentization", allows assessing similarities as well as differences in policy impacts between the two modelling approaches, in turn providing a test of the robustness of the GE results. We find that the agent-based model is able to replicate many results of the general equilibrium analysis, while revealing strengths and weaknesses of both model types. We discuss concrete implementation steps and difficulties experienced in the GE-ABM translation process. We illustrate the potential of ABM by extending the model in several directions. We show that heterogeneous subsistence consumption can increase the space for combining a double dividend with an equity goal, and that overall macro-economic results can conceal important distributional impacts when green preferences and labour supply elasticities vary.

Environmental tax reform (ETR), a shift from labour to carbon taxes, has been mostly modelled using general equilibrium (GE) analysis. Since a low-carbon transition will require deep transformations, one will also have to address out-of-equilibrium dynamics and increased agent heterogeneity. Unlike GE models, agent-based models (ABMs) are well equipped to deal with this. We therefore replicate a recent GE model for ETR using an agent-based approach. This process, known as "agentization", allows assessing similarities as well as differences in policy impacts between the two modelling approaches, in turn providing a test of the robustness of the GE results. We find that the agent-based model is able to replicate many results of the general equilibrium analysis, while revealing strengths and weaknesses of both model types. We discuss concrete implementation steps and difficulties experienced in the GE-ABM translation process. We illustrate the potential of ABM by extending the model in several directions. We show that heterogeneous subsistence consumption can increase the space for combining a double dividend with an equity goal, and that overall macro-economic results can conceal important distributional impacts when green preferences and labour supply elasticities vary.

Industrial heat and cooling applications are an essential fraction of the overall energy demand, mainly produced by fossil fuels. Solar thermal energy production can satisfy such a need by adopting the High Vacuum Flat Plate Collectors (HVFPCs) and increasing their efficiency. The absorptance and emittance of Selective Solar Absorbers (SSAs) determine the thermal efficiency of HVFPCs. Being the absorptance already maximized, the thermal emittance of the absorber should be minimized to increase further the operating temperature of the collector and its efficiency. This research aims to reduce the thermal emittance of commercially available Selective Solar Absorber by depositing a thin silver film on the aluminium substrate. So, in this work, the thermal stability of a silver coating has been investigated, and a diffusion barrier layer has been adopted to stabilize the coating performance up to 360 degrees C. The low-emissive layer of Ag and a diffusion barrier of CrOx guarantees a decrease of 11% in thermal emittance at 200 degrees C of commercially available SSA deposited on aluminium. Further emittance reduction can be obtained by depositing a thin Ag film on both sides of the aluminium substrate before the SSA deposition, proving to be a promising way to enhance the efficiency of HVFPCs.

Industrial heat and cooling applications are an essential fraction of the overall energy demand, mainly produced by fossil fuels. Solar thermal energy production can satisfy such a need by adopting the High Vacuum Flat Plate Collectors (HVFPCs) and increasing their efficiency. The absorptance and emittance of Selective Solar Absorbers (SSAs) determine the thermal efficiency of HVFPCs. Being the absorptance already maximized, the thermal emittance of the absorber should be minimized to increase further the operating temperature of the collector and its efficiency. This research aims to reduce the thermal emittance of commercially available Selective Solar Absorber by depositing a thin silver film on the aluminium substrate. So, in this work, the thermal stability of a silver coating has been investigated, and a diffusion barrier layer has been adopted to stabilize the coating performance up to 360 degrees C. The low-emissive layer of Ag and a diffusion barrier of CrOx guarantees a decrease of 11% in thermal emittance at 200 degrees C of commercially available SSA deposited on aluminium. Further emittance reduction can be obtained by depositing a thin Ag film on both sides of the aluminium substrate before the SSA deposition, proving to be a promising way to enhance the efficiency of HVFPCs.

The debate surrounding the Farm to Fork Strategy and the European Green Deal with the new sustainability standards proposed by the European Commission to achieve a more sustainable food system and climate-neutral continent by 2050 is increasing concerns and questions among different stakeholders along the food chain and third countries that will be impacted by these measures, if adopted. This analysis aims to expand the debate studying the different perspectives on the relationship food security/sustainability of the European Union and the African Union through the framing of the documents produced by these institutions since 2007. The results show differences in the approach about this relationship seen by the European Union as a long-term goal that looks at the protection of the environment and natural resources while the production changes to be more resilient to external shocks and market fluctuations. Meanwhile, the African Union uses a short-term approach due to the urgency felt by the continental unique environment that makes production development and adapting a priority over environmental issues. These differences need to be targeted to avoid current and future divergences that could impact on the application of the aforementioned standards and to ensure food for all without compromising the future of our ecosystems.

The debate surrounding the Farm to Fork Strategy and the European Green Deal with the new sustainability standards proposed by the European Commission to achieve a more sustainable food system and climate-neutral continent by 2050 is increasing concerns and questions among different stakeholders along the food chain and third countries that will be impacted by these measures, if adopted. This analysis aims to expand the debate studying the different perspectives on the relationship food security/sustainability of the European Union and the African Union through the framing of the documents produced by these institutions since 2007. The results show differences in the approach about this relationship seen by the European Union as a long-term goal that looks at the protection of the environment and natural resources while the production changes to be more resilient to external shocks and market fluctuations. Meanwhile, the African Union uses a short-term approach due to the urgency felt by the continental unique environment that makes production development and adapting a priority over environmental issues. These differences need to be targeted to avoid current and future divergences that could impact on the application of the aforementioned standards and to ensure food for all without compromising the future of our ecosystems.

Environmental science & technology 57(44), 17011 - 17021 (2023). doi:10.1021/acs.est.3c05017 Published by American Chemical Society, Columbus, Ohio