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• Mapping material stocks at 10 m resolution for the entire UK and IRL. • 9 building types, 32 mobility infrastructure types, 12 materials. • Building stocks per capita are surprisingly similar for most population densities. • Infrastructure stocks per capita decrease with higher population densities. • High-resolution maps can inform circular economy strategies and actions. Understanding the size and spatial distribution of material stocks is crucial for sustainable resource management and climate change mitigation. This study presents high-resolution maps of buildings and mobility infrastructure stocks for the United Kingdom (UK) and the Republic of Ireland (IRL) at 10 m, combining satellite-based Earth observations, OpenStreetMaps, and material intensities research. Stocks in the UK and IRL amount to 19.8 Gigatons or 279 tons/cap, predominantly aggregate, concrete and bricks, as well as various metals and timber. Building stocks per capita are surprisingly similar across medium to high population density, with only the lowest population densities having substantially larger per capita stocks. Infrastructure stocks per capita decrease with higher population density. Interestingly, for a given building stock within an area, infrastructure stocks are substantially larger in IRL than in the UK. These maps can provide useful insights for sustainable urban planning and advancing a circular economy. [ABSTRACT FROM AUTHOR]

Against the backdrop of a fragmented and evolving governance landscape, this paper examines how effective climate commissions are in engaging the public to co-produce local climate action in the UK. Climate commissions are emerging amid heightened concerns regarding the top-down style of policymaking on climate change and resource-constrained local authorities. However, less is known about how they engage the public who are pivotal for climate action, both in signalling greater ambition from governments and through their own mitigation and adaptation efforts. This paper draws on qualitative interviews with an array of individuals both inside and outside climate commissions in the UK, and utilises Cash's theoretical framework of 'salience, legitimacy and credibility' to assess how effective climate commissions are in engaging the public to co-produce local climate action. The findings indicate a discernible chasm between commissions and the broader public. Equally however, they provide hopeful perspectives into the effect that more collaborative engagement, that speaks to local concerns and leverages local knowledge, would have on commissions' 'salience, legitimacy and credibility' and, additionally, the legitimacy of local authorities. Moreover, they suggest that deeper collaboration with local networks of community groups, who are not yet represented on commissions, could foster more sustained climate action. It concludes by considering the novel implications of these emergent insights for the Cash framework and what this means for commissions in their future engagement with the public. • Knowledge co-production resonates in both theory and practice. • Local and grassroot action is critical to meet climate mitigation and adaptation goals. • Ensuring 'salience, legitimacy and credibility' can lead to more effective climate policy. • Climate commissions need to better leverage local knowledge to drive climate action. • Community groups are under-utilised in climate conversations and decision-making. [ABSTRACT FROM AUTHOR]

The ocean is increasingly used for industry, energy and recreation or protected for conservation, resulting in increasing spatial restrictions for fisheries. Simultaneously, producing seafood with a low climate footprint is becoming increasingly important. Despite this, the effects of spatial restrictions on the emissions of fishing fleets are poorly known. In the Northeast Atlantic, the withdrawal of the United Kingdom from the EU (Brexit) meant that the UK regained autonomy in its Exclusive Economic Zone (EEZ). This suddenly imposed a spatial restriction for several foreign fishing fleets targeting Northeast Atlantic mackerel (Scomber scombrus). Here, we use this natural experiment and open fisheries data to investigate how Brexit affected the performance and emissions of the Norwegian mackerel fishery. As the fleet was excluded from fishing grounds in the UK, the catch per fishing trip almost halved, while the number of trips per vessel doubled. As a result, fuel use intensity (FUI) more than doubled from ∼0.08 to ∼0.18 L fuel per kg mackerel. We estimate that this shift required an additional 23 million liters of fuel per year, causing additional fuel costs of ∼€18 million annually and emitting an additional ∼72,000 tonnes CO 2 per year. The policy change undid ∼15 years of improved fuel efficiency in Norwegian pelagic fisheries. These findings provide rare empirical evidence on how spatial restrictions can undermine progress towards decreasing greenhouse gas emissions in fisheries, highlighting the need to monitor and account for emissions in fisheries management and consider these trade-offs in marine spatial management. [ABSTRACT FROM AUTHOR]