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In 2010, the Brazilian authorities approved the National Policy on Solid Waste (NPSW) with the aim of promoting the recycling and reuse of solid waste. However, assessing the distribution and progress of recyclable material recovery following the implementation of this key government policy remains a challenging task. Therefore, this study employs a spatial-temporal analysis to investigate the impact of the NPSW on the recovery of recyclable waste in Brazil. We employed spatial statistical techniques such as Getis-Ord Gi* and Global Moran's I. The results revealed significant and heterogeneous clustering of recycled materials among municipalities, both before and after the implementation of the NPSW. The analysis demonstrated that recycled waste tended to cluster in more developed and urbanized areas, while a considerable number of cold spots were observed in less developed regions or densely populated areas, indicating low recycling rates. These findings raise environmental concerns for policymakers and emphasize the need for interventions to enhance recycling efforts. The study highlights the urgency of improving municipal solid waste management and raising awareness among local communities about the economic and environmental benefits of recycling, particularly in areas characterized by unsanitary living conditions, poverty, and low-income disparities. Therefore, it is recommended to tailor the legal framework to local realities, considering the vast and socioeconomically diverse landscape of Brazil. [Display omitted] • This study examined the spatial-temporal trends in the recovery of recyclable waste. • The recovery of recycled waste exhibits significant heterogeneity in Brazil. • Increasing recycling rates poses a challenge and raises concerns for the environment. • It is crucial to adapt laws in local contexts in order to enhance recovery rates. • Governments and stakeholders should explore the potential of recycling. [ABSTRACT FROM AUTHOR]

Sustainability perception can be understood as humans' awareness of the environment. This study assessed the sustainability perception of the Paraná III Basin residents in Brazil through item response theory (IRT). For this purpose, a scale to measure sustainability perception, in which the items and latent features of respondents in the same unit of measurement are positioned, was constructed. Fifty-two items (sustainability indicators) evaluated through structured questionnaires applied to 2519 respondents, residents of three cities in the study area, were created. The results indicated that 52.3% of respondents have no, very low or low perception of sustainability, and the study population was allocated between levels 90 and 100 of the perception scale. IRT was suitable for the data analysis because it enabled quality evaluation of the items, construction of a scale to quantify sustainability perception and identification of perception levels. The developed tool - the measurement scale for sustainability perception - can be used by those responsible for local environmental governance to develop projects aimed at social and environmental education with the goal of identifying alternatives to raise the perception levels of the local residents. [ABSTRACT FROM AUTHOR]