The concept of resilience has become increasingly important to our understanding of sustainable planning. Post-disaster urban and architectural reconstruction might be treated as a strategy for resilient cities, helping them to reinvent themselves after possible destruction. The purpose of this study is to analyse several cases of nearly total reconstruction of historical urban complexes. Specifically, it explores how urban heritage conservation and recreation could contribute to the resilience agenda, giving traumatised societies a sense of continuity and localness. It analyses the changes in the conservation doctrine, highlighting the growing acceptance of architectural reconstructions. Drawing on historical examples, mainly derived from the Polish School of Conservation practice, this paper argues that the methods and processes attempted to regain identity for the thoroughly rebuilt structures proved effective in recreating the identity of such cities as Kalisz, Warsaw, Gdańsk, and Wrocław. The article argues that while processes at the governmental level emphasised the strengthening of national identity, the experiences of the reconstructed townscapes eventually involved forms of more diverse municipal identities. The article highlights that the strategy of recreating traditional images of cities after their mutilation in disastrous events might be a key to becoming a more resilient city and the formation of the post-disaster citizenry.

Health impacts and a decrease in the quality of life caused by air pollution is a major problem worldwide. Krakow is one of the most affected cities in the EU by air pollution mostly caused by burning solid fuels in households’ furnaces. It is considered that the most effective remedies would be adequate spatial planning solutions and application of low-emission sources including renewable energy sources (RES). This article draws from the analysis of the use of RES as a means for reducing harmful emissions in Krakow Functional Area (KrOF). The inventories of renewable energy sources and systems were compiled by the authors as a part of the EU project “Smart Edge—Sustainable Metropolitan Areas and the Role of The Edge City”. Using the data from the inventories, a SWOT analysis has been carried out to identify factors that determine the smart management of the RES potential, particularly the decisions of households on the transition towards RES. The results of the analysis have shown that many actions have been taken at the national, regional, and local levels but the greatest influence bear the solutions initiated and implemented at the communal level. The conclusion is that legislative regulations should be combined with locally tailor-made instruments. The proposed method of analysis can be applied in other metropolitan areas as a diagnostic procedure supporting action planning to solve air-quality problems caused by distributed emission sources.

Historic buildings constitute a specific group of buildings where the possibilities of improving energy efficiency and comfort are significantly limited because of the existing construction features and heritage values. Each building has a different history so the scope of renovation and/or retrofitting must be determined individually for each building. This article presents the methodology of measurement and diagnosis of features of particular importance for energy performance and comfort improvements, based on the example of a historic masonry building located in southern Poland. The first research question was which of the comfort conditions have been exceeded according to measurements. The second issue concerned the necessary extension of the basic determinants of comfort, beyond measurable qualities. A multi-faceted approach to the comfort assessment is proposed, including qualitative research that applies the additional criterion of aesthetic comfort. During the case study diagnosis, the acceptable level was exceeded in thermal, acoustic and aesthetic comfort. The first two may be addressed by optimized technical measures whilst the latter through a research-through-design that addresses the complex relationship between the perceiver and what the environment affords. The solution reflects the need to meet demands for retrofits that are energy-efficient and aesthetically pleasing while minimizing any negative impacts on the heritage and the environment.

This article reviews the evolution of local environmental policy in the context of energy transition and particularly the implementation of RES. The study concerns Kraków, whose policy has been compared with other cities and metropolises and was analysed in a timespan of about 30 years. It was hypothesised that, until recently, RES were treated in the city with reserve concerning their feasibility in local environmental and economic conditions, but since RES have been appreciated as a viable means to effectively combat low-stack emissions, the local air quality targets have been integrated with global decarbonisation goals. This launched a dedicated subsidy stream for RES installations and contributed to the sharp increase in the number of installations. Trend analysis techniques have been used to study environmental indicators in relation to the evolution of municipal policies, the expenditures, and their effects. The review confirms that the implementation of RES had not been a priority for Kraków but a complementary measure to those aimed at improving air quality. The recent integration of the environmental and RES policies has been the next step that is now helping to pursue both the city’s strategic goals: further air quality improvement and climate neutrality by 2050. Kraków may serve as an example of a city that has treated RES in a manner adequate to local conditions and capabilities, thus achieving the intended goals.

The growing problem of urban sprawl – low-density, fragmented, car-dependent development on greenfields – is increasingly serious for both Europe and the rest of the world. It brings with it a number of negative consequences for human health, well-being, social and economic performance, and negative ecological impacts, including emissions, which contribute to climate change. Therefore, in order to improve urban quality of life and address the "20-20-20 strategy" of global objectives, we propose a series of pilot projects that introduce significant planning, managerial and technology initiatives combined to enhance cooperation between European citizens and experts. To increase the extent and health of urban cultivation and maximize the benefits of an urban canopy, cities need an integrated approach and innovations from city planners, engineers, and landscape architects, as well as citizen advocacy and participation along the lines of public-private partnerships. We presume that even if various actors share a common vision, it needs more knowledge for maximum benefits to develop. Our thesis is that urban cultivation can play a significant role as a catalyst for socio-economic sustainability. Comparing benefits from urban forest and agrarian functions, which in many places would compete for the same space, would be necessary. There is now an increasing body of knowledge that several measures of high urban density – including residential, retail, and service density, street-intersection density, and land-use diversity – might have important public health consequences. With more evidence, one can plan neighbourhoods that are more compact and more attractive (thanks to activity-influencing factors such as local services, public transport, leisure, agrarian activities and more), halt invasive sprawl, promote physical activity and social interaction, and shield from environmental and social negatives, such as pollution and feeling unsafe. In this project, the Nature-Based Solutions concept will be applied to improve the impact on quality of life. In this sense, CitAgra would leverage the EU agenda by making the project a form of pilot implementation.