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The unique properties that nanoparticles exhibit, due to their small size, are the principal reason for their numerous applications, but at the same time, this might be a massive menace to the environment. The number of studies that assess the possible ecotoxicity of nanomaterials has been increasing over the last decade to determine if, despite the positive aspects, they should be considered a potential health risk. To evaluate their potential toxicity, models are used in all types of organisms, from unicellular bacteria to complex animal species. In order to better understand the environmental consequences of nanotechnology, this literature review aims to describe and classify nanoparticles, evaluating their life cycle, their environmental releasing capacity and the type of impact, particularly on living beings, highlighting the need to develop more severe and detailed legislation. Due to their diversity, nanoparticles will be discussed in generic terms focusing on the impact of a great variety of them, highlighting the most interesting ones for the industry.

The mitigation hierarchy is a decision-making framework designed to address impacts on biodiversity and ecosystem services through first seeking to avoid impacts wherever possible, then minimizing or restoring impacts, and finally by offsetting any unavoidable impacts. Avoiding impacts is seen by many as the most certain and effective way of managing harm to biodiversity, and its position as the first stage of the mitigation hierarchy indicates that it should be prioritized ahead of other stages. However, despite an abundance of legislative and voluntary requirements, there is often a failure to avoid impacts. We discuss reasons for this failure and outline some possible solutions. We highlight the key roles that can be played by conservation organizations in cultivating political will, holding decision makers accountable to the law, improving the processes of impact assessment and avoidance, building capacity, and providing technical knowledge. A renewed focus on impact avoidance as the foundation of the mitigation hierarchy could help to limit the impacts on biodiversity of large-scale developments in energy, infrastructure, agriculture and other sectors.

Purpose The purpose of this paper is to explore how circular start-ups design and implement innovation into their business models to increase their positive impact. Design/methodology/approach This qualitative study is based on an exploratory multiple-case study involving six circular start-ups with positive impact in Poland. Data gathering took place via in-depth interviews with start-up founders. Findings The analysis demonstrates that three factors, which are strongly interconnected, can significantly influence the development of a circular start-up. The first is the purpose-led motivation for circularity as a solution, mostly concentrated on the environmental education of different market actors. The second factor is built on the aim to increase the positive impact by addressing the most pressing social and environmental problems. It determines the impact on society as well as on the environment and the extent to which its model can be scaled up. The third factor is driven by the understanding of the purpose of the innovation, concentrated on the business model innovation regarding circularity. Practical implications This paper demonstrates the benefits for diverse stakeholders and the importance of using circular business models in start-up development. Circularity can be perceived as a main part of the new approach to improve sustainability. Originality/value Circular start-ups represent a new phenomenon in the entrepreneurial market. While the structure and logic of the circular business model in start-ups are significantly unexplored in the management literature, this model is viewed as a crucial step in the direction of increasing the positive impact of start-ups. From a theoretical and practical perspective, it is important to understand the differences and similarities in this area within different markets.

The ecological environment is fragile in arid regions, and the direct and indirect impacts of continuing urbanization on vegetation growth in cities still need to be studied in depth. In this study, we focused on four provincial capital cities (Urumqi, Lanzhou, Yinchuan, and Hohhot) in arid regions of China. We used continuous 30 m land cover and vegetation greenness (VG) data from 1990 to 2021 to extract the impact of urbanization on vegetation growth by separating the impact of natural conditions. Our results showed that the study area’s urban area (UA) had expanded rapidly at a rate of 39.2 km 2 /a, increasing by 3.39 times between 1990 and 2021. While urban expansion occurred rapidly, the overall VG of the study area also increased (slope = 2.16 × 10 −3 ), with the enhancement of VG increasing gradually from west to east. The VG and its trend in the UA were significantly higher than those in the natural vegetation area (NA). In addition, the duration of the urban vegetation growth season was longer than that of the NA, which also confirmed the positive impact of urbanization on the vegetation growth period. Furthermore, we found that the positive impact of urbanization on vegetation had continuously strengthened over time. In 1990 and 2021, the VG areas had 83% and 87% above the ‘zero-impact line’ in the UA, respectively, indicating a very significant impact of urbanization on vegetation growth in arid regions with fragile natural conditions. Our study identified the long-term dynamic trends in urbanization and VG in arid regions and clarified the non-linear relationship between the two concurrent growth factors. This has significant implications for correctly understanding the impact of urbanization on vegetation in arid regions and can provide a scientific reference for the ecological construction of urban environments in the region.

Objective: This study has focused on identifying the impact of work from home among women educators during COVID-19.   Theoretical framework: COVID-19 had an array of impacts on businesses and individuals, and as a result of this, authorities even in the educational sectors, have implemented and developed the work-from-home concept, creating novel opportunities for women educators to manage their work daily, at the same time this approach had impacted them in managing two unique environments with different needs and schedules.   Methods: Data collection has been done using the instrument called a structured questionnaire with a five-point Likert scale. The respondents were the women educators who worked from home, particularly during the global pandemic from the selected districts of Tamil Nadu namely, Vellore, Ranipet, Tirupattur and Tiruvannamalai. The data collected were analyzed using the SPSS Software (Version.25) by applying percentage and independent sample t-test analysis.   Results and conclusion: The study's findings indicate that the majority of the women educators in the study experienced both positive and negative impacts while working from home during the pandemic.   Research, practical & social implications: This study allows the higher educational institutional authorities to assist women educators in coping with their responsibilities while working from home by providing efficient training on the usage of digital tools.   Originality/value: The article delves into an extensive discussion regarding the accuracy and ground reality of positive and negative impacts of work from home concept among women educators.

PurposeEnterprise social media platforms (ESMPs) are web 2.0-based computer media tools that facilitate knowledge sharing by employees. The purpose of this paper is to outline the potential of ESMPs in both enabling and hindering knowledge sharing from the perspective of affordances.Design/methodology/approachThis is a conceptual paper which integrates the literature on ESMPs’ affordances and knowledge sharing.FindingsThis paper finds that prior research on affordances only considered artifacts without much attention on the role of individual goals and organizational context. ESMPs may both enable and hinder knowledge sharing by affording different user behaviors contingent on artifacts, individual goals and organizational context.Practical implicationsThe results of the paper will help managers and ESMPs designers to better understand the potential of ESMPs and pay attention to the positive and negative impacts of ESMPs in the process of knowledge sharing.Originality/valueThe paper derives a new categorization of affordances based on individual goals and organization context and portrays a model to describe how and when these affordances enable knowledge sharing through the development of transactive memory system and social capital and hinder knowledge sharing through overload, groupthink and privacy invasion.

PurposeThis paper seeks ways to address positive social impacts in social life cycle assessment (SLCA) and attempts to answer two questions: How can the SLCA methodology be improved in order to systematically identify all potential positive impacts in the supply chain? How can positive impacts be taken into consideration along with negative impacts in SLCA? In order for SLCA to be an attractive tool, it needs to provide users with the possibility to include positive impacts, not as variables stipulating lack of negative impacts but rather as fulfilment of positive potentials.MethodsBy scrutinising the social impacts addressed in the SLCA UNEP/SETAC Guidelines today and reviewing approaches for positive impacts in other research fields, a developed approach to capture and aggregate positive social impacts in SLCA is proposed. To exemplify the application, the case of vehicle fuels is used to investigate the possibilities of addressing positive impacts in SLCA. This includes a literature review on potential positive social impacts linked to vehicle fuels.Results and discussionThe subcategories in the SLCA Guidelines are proposed to be divided into positive and negative impacts and complemented with some additional positive impacts. Related indicators are proposed. A draft approach for assessing positive impacts is developed where the proposed indicators are categorised in four different levels, from low to very high potential positive impact. The possibility to aggregate positive social impacts is discussed. Besides multi-criteria decision analysis (MCDA), few useful ideas for aggregating positive impacts in SLCA were found in the literature that mostly focused on surveys and monetarisation. Positive social impacts linked to vehicle fuels (fossil fuels and biofuels) are identified, and the proposed approach is schematically applied to vehicle fuels.ConclusionsThe SLCA methodology may be refined in order to better identify and assess positive impacts, and approaches developed for capturing and aggregating such impacts are proposed. Challenges of aggregating positive and negative social impacts still remain. The knowledge on social impacts from vehicle fuels could be improved by applying the proposed approach. However, the approach needs more development to be practically applicable.

In this paper, the authors perform a comprehensive literature review of the positive impacts of blockchain-based information exchange in the maritime transport sector, as well as the challenges and barriers for successful blockchain-based information exchange, considering all three aspects of the sustainability (economic, environmental, and social). The papers from relevant databases (Web of Science and Scopus) and selected studies have been used. The literature coverage was expanded by using backward snowball sampling. In total, 20 positive impacts and 20 challenges/barriers were singled out. Despite the identified barriers and challenges (such as the slow acceptance of blockchain technology in the maritime transport sector or the high implementation cost), blockchain technology possesses a definite potential to improve the information exchange between all involved stakeholders (for example, by improving the visibility across transport routes and by reducing the paper-based processes), positively affecting all three aspects of sustainability. The authors contribute to the existing research of the economic aspect of maritime transport sustainability by blockchain-based information exchange by expanding it and by researching the environmental and social aspects of sustainability.

Marital relationships are significantly shaped by dowry practices. The continued demand for dowries leads to interpersonal problems, demanding coping strategies and influencing marriage satisfaction. The present research aimed to ascertain the dowries impact (positive and negative) and marital coping strategies on the marriage satisfaction. A correlational research design, with a sample of 486 married women was recruited using convenient sampling strategy. The mean age at the time of their marriage was (M = 23.03, SD = 3.00) with a maximum marriage duration of 7 years with at least 1 child. Assessment was done using; The Dowry scale (Sultana, 2002), The ENRICH Marital Satisfaction scale (Fowers and Olson, 1993) and Marital Coping Inventory (Bowman, 1990). Correlation analysis revealed negative impact of dowry leads to lower marriage satisfaction (r =-.11, p <,05), conflict, self-blame, self-interest and avoidance leads to lower marital satisfaction while positive approach represented positive relation with marriage satisfaction. Hierarchical regression analysis revealed that negative impacts of dowry are a stronger indicator of marital satisfaction. Step-wise regression analysis revealed marital coping strategies jointly explained 38% of the variation in marital satisfaction, with self-blame emerged as the stronger negative predictor. Among the demographic characteristics, joint family system corresponded to greater marital satisfaction. The findings indicate that reducing dowry-related stressors and strengthening adaptive marital coping skills can improve marital satisfaction, guiding culturally sensitive counseling, premarital education, and policy interventions.

Increased recognition of the business case for managing corporate impacts on the environment has helped drive increasingly detailed and quantified corporate environmental goals. Foremost among these are goals of no net loss (NNL) and net positive impact (NPI). We assess the scale and growth of such corporate goals. Since the first public, company-wide NNL/NPI goal in 2001, 32 companies have set similar goals, of which 18 specifically include biodiversity. Mining companies have set the most NNL/NPI goals, and the majority of those that include biodiversity, despite the generally lower total global impact of the mining industry on biodiversity compared to the agriculture or forestry industries. This could be linked to the mining industry's greater participation in best practice bodies, high-profile impacts, and higher profit margins per area of impact. The detail and quality of present goals vary widely. We examined specific NNL/NPI goals and assessed the extent to which their key components were likely to increase the effectiveness of these goals in benefiting biodiversity and managing business risk. Nonetheless, outcomes are more important than goals, and we urge conservationists to work with companies to both support and monitor their efforts to achieve increasingly ambitious environmental goals.