We built an emission inventory (EI) for the megacity of Bogotá, Colombia for 2012, which for the first time augments traditional industrial and mobile sources by including commercial sources, biogenic sources, and resuspended dust. We characterized the methodologies for estimating each source annually, and allocated the sources to hourly and 1 km² spatial resolution for use as inputs for air quality modeling purposes. A resuspended particulate matter (RPM) emission estimate was developed using the first measurements of road dust loadings and silt content for the city. Results show that mobile sources dominate emissions of CO₂ (80%), CO (99%), VOC (68%), NO_x (95%), and SO₂ (85%). However, the newly estimated RPM comprises 90% of total PM₁₀ emissions, which are at least onefold larger than the PM₁₀ emissions from combustion processes. The 2012 EI was implemented in a chemical transport model (CTM) in order to understand the pollutants’ fate and transport. Model evaluation was conducted against observations from the city’s air quality monitoring network in two different periods. Modeling results for O₃ concentrations showed a good agreement, with mean fractional bias (MFB) of +11%, and a mean fractional error (MFE) of +35% with observations, but simulated PM₁₀ concentrations were strongly biased high (MFB +57%, MFE +68%), which was likely due to RPM emissions being overestimated. NO_x, CO, and SO₂ were also biased high by the model, which was probably due to emissions not reflecting current fleet conditions. Future work aims to revise emission factors for mobile sources, which are the main sources of pollutants to the atmosphere.

Since the introduction of neoclassical economic theory, material wealth and accumulation have been linked to hedonic wellbeing. In turn, Utilitarian notions have generated the belief that infinite growth is not only good but necessary for society to prosper. Unsurprisingly, this belief system has supported the considerable depletion of natural resources and has not always led to social equitability or environmental justice, two pillars of sustainable development. Given these limitations, this paper looks into eudaimonic wellbeing, as defined by Stoicism. The latter originating in Classical Greece and Ancient Rome, has been used throughout the centuries to discuss and support the flourishing of individuals, but has rarely been applied to collective wellbeing. Consequently, we explore whether, and to what extent, this virtue-based philosophy can answer questions regarding the value and the role of material acquisition in societal development, as directed by sustainable policy. We propose the idea that the Stoic emphasis on prudence, self-control, courage and justice, as the only means to achieve “happiness”, is intrinsically linked to sustainable wellbeing and that its principles can be used to demonstrate that society does not require limitless growth to flourish.

Energy has been at the forefront of the sustainable development discourse for quite some time as policymakers, industry heads and society at large have taken progressive steps to cut carbon via renewable energy technologies and energy efficiency measures. Unfortunately, some of these methods have given rise to perverse socio-environmental effects; as materials have been unnecessarily sacrificed, mines and wells have opened and plantations grown, in the name of energy saving. This paper contributes to clean energy-orientated policies and practices by exploring the discipline of sustainable materials. We first review two strategies: energy efficiency linked to materials; and material efficiency, meaning “doing more with less.” We find that, although both contribute significantly, they are hampered by the rebound effect and their focus on “doing less bad” rather than “good”. Furthermore, they do not in themselves evaluate the services and societal wellbeing that materials provide. We then define “material services” and propose a wider strategy that encompasses and enhances the previous two. Under the new strategy, we argue that sustainable materials should be considered as those that do no harm and which optimally, through the services provided, contribute to better sustainable development policies and practices.

In support of sustainable development, the United Nations (UN) launched its Global Education First Initiative (GEFI) with the aims of accelerating progress towards universal access to education, good quality learning and the fostering of global citizenship. This paper explores how and to what extent Stoic virtue ethics and critical Freirean ecopedagogies can advance the UN’s vision for progressive educational systems with transformative societal effects. We propose an integrated solution that provides ecopedagogical concepts a more robust philosophical foundation whilst also offering Stoicism additional tools to tackle 21st-century problems, such as climate change and environmental degradation. The result of the paper is the preliminary theoretical underpinnings of an educational framework that encompasses planetary-level concerns and offers a fuller expression of the terms “sustainable development” and “global citizen”.