This article aims to describe the current state of research on plastic waste management as a circular economy practice at the end of the supply chain. The methodological strategy chosen was a systematic literature review. The articles selected from the Web of Science and Scopus databases were screened, and the research corpus consisted of 201 articles published in journals between 2014 and 2021. The results present 13 study categories, showing topics such as pyrolysis, business models, Industry 4.0, and energy generation. The insertion of Industry 4.0 technologies is still in its initial stages, comprising mainly the generation of inputs to reuse waste for 3D printers’ materials. Regarding energy generation, the insertion of processes such as pyrolysis for fuel generation stands out. The proposed discussion in this article suggests a circular ecosystem in which wastes follow a reuse flow according to their properties; incineration can be an option depending on the stage and benefits generated from the removal of plastic waste from the ecosystem. The highlighted issue is the scalability of the developed processes in the research, which is only possible if the state, universities, and civil society integrate efforts in the construction of a circular ecosystem infrastructure for waste management.

Cities and their constant growth have a crucial role in global sustainable development. The objective of this article is to present a conceptual framework of collaborative governance for the shaping of sustainable cities. The adoption of the multiple case study (5) method allowed understanding the reality of the cities of Copenhagen (Denmark), Amsterdam (Netherlands), London (England), Hamburg (Germany) and Barcelona (Spain). Sources of evidence were collected through in-depth interviews, documents, and observation, plus the data analysis was performed by using the NVivo software. For that, exploratory-descriptive research was conducted with the use of a qualitative research approach. The results exhibit strategies, benefits, risks, and limits inherent to collaborative governance systems in the cities and bring contributions to the development of the governance theory.

As Novas Diretrizes e a Importância do Planejamento Urbano para o Desenvolvimento de Cidades Sustentáveis

The growth of urban centers, along with the fragmentation of natural habitats, can interfere with the distribution pattern of species and their abundance, thus compromising the conservation of urban biodiversity. Principal players in this biodiversity are arthropods that help to decompose litterfall, favoring the recycling of nutrients and, hence, are an important part in sustaining the forest fragments that remain in urban areas. Therefore, it is important to study arthropod biodiversity in green urban areas, especially those areas where litterfall management is an important part of maintaining biodiversity. Accordingly, this study evaluated arthropod diversity associated with litterfall in three urban forests with different size and litterfall management practices, including Água Branca Park (ABP) and Tietê Ecological Park (TEP)—Núcleo Engenheiro Goulart in São Paulo City and Chico Mendes Park (CMP) in Osasco City, all belonging to the Metropolitan Region of São Paulo (MRSP), Brazil. Four litterfall harvests were carried out in each park between April and August of 2015 with twelve samples collected with a wood mold (30-cmx30-cm) at randomly points on the forest floor. The collected material was then screened in the laboratory and the arthropods were visually separated and preserved in alcohol 70%. Arthropods were classified by the order to which they belonged. Litterfall was dried in a forced air oven at 65 °C for seven days. Dried litterfall was then separated into leaves, branches, reproductive parts and miscellaneous fragments and weighed. Arthropod diversity was measured by Shannon, Margalef and Pielou indexes and non-metric multidimensional scaling analysis (NMDS) using the Manhattan distance index. Litterfall weight was compared by one-way ANOVA. The orders Hymenoptera, Collembola and Isopoda were dominant in CMP, ABP and TEP, respectively but multiple rare orders had a presence in all parks, albeit at different abundance. NMDS showed abundance similarity among the parks; however, TEP showed greater richness, Shannon diversity and evenness. The fractions of leaf litterfall and reproductive parts were different between the CMP and TEP. Overall, our results confirm that neither litterfall management, nor park size, is a final determinant of arthropod distribution, even though the abundance of dominant species was shown to differ in each park.

Resumo Este ensaio teórico, com base em literatura, reflexões, e práticas, tem como objetivo apresentar e discorrer sobre as principais contribuições resultantes do segundo seminário do Ciclo UrbanSus - Inovação, Sustentabilidade e Ação Sistêmica nas Cidades, em particular nos painéis sobre inovação urbana e capacitação de recursos humanos. O texto reforça a importância das abordagens multissetoriais, multiprofissionais e interdisciplinares para potencializar o uso de novas ideias, novas formas de gestão e novas tecnologias na direção da sustentabilidade urbana. Entre os principais desafios são destacados: a transferência de tecnologia e a educação computacional; a superação dos interesses econômicos de curto prazo, novos modelos para financiamento de soluções inteligentes; e para governança; métodos diagnósticos que aproveitem as massas de dados; e o fortalecimento das estratégias para difusão do conhecimento, incluindo o papel das universidades e dos cursos de pós-graduação.

O objetivo deste artigo foi analisar as ações de responsabilidade social das indústrias metalúrgica e de mineração no Brasil, além das contribuições para a proteção do meio ambiente, promoção do desenvolvimento social e comunitário, condições dignas trabalho e renda, e fortalecimento dos direitos humanos, como parte da estratégia competitiva. A pesquisa se caracteriza como exploratória e descritiva, pois foi desenvolvida a partir de levantamento bibliográfico e documental em websites corporativos e relatórios de sustentabilidade. Os resultados revelam um conjunto de características da responsabilidade social dos setores metalúrgico e de mineração no Brasil, e a articulação da responsabilidade social com a estratégia competitiva.