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Improper waste management has been a serious issue in many countries, thus, home composting is considered as an effective method in solid waste management (SWM). Based on qualitative research methods, this study explores peoples' motives to choose composting and main problems confronted by them in home composting in Kaduwela and Moratuwa municipalities in the Western Province of Sri Lanka and proposes policy measures to improve home compositing.

This study was mainly based on qualitative research methods. A convenient sample of 40 households including 20 households from each municipal council (MC) has been selected using semi-structured interviews. Descriptive methods were used to analyze the data.

Citizens have chosen to compost mainly, for gardening, the influence of local authorities, economic benefits and environmental and health concerns. Fear of potential health problems, lack of resources, problems caused by animals, problems related to compost bins, limited knowledge and awareness about composting are difficulties encountered during home composting. Providing compost bins to people at a concessionary price or for free of charge, providing required facilities and financial assistance, promoting people's positive attitudes and awareness, encouraging the use of compost in households, improving the standard of composting and making relevant legal and institutional arrangements to promote people's participation in home composting are suggested for encouraging home composting.

This study used a small sample, which is the main limitation of this study.

The policy implication will help to improve composting solid waste practices of the Local Governments.

There is a lack of research on composting related to the selected municipalities. As composting is an effective method in SWM, the findings and the proposed policy measures of this study will help to improve the SWM of the Local Governments of Sri Lanka.

A composting project was introduced into an undergraduate microbiology course, to evaluate its efficacy against traditional lecturing for teaching environmental sustainability.

The research project was a semester-long intervention. Three groups of students participated in the study: a group of 47 female undergraduate students were involved in a composting project, a group of 43 female students were exposed to a traditional lecture and a group of 34 students were the control group. A pretest and a posttest were used, along with poster presentations for the composting project students. In addition, a questionnaire was used to examine students' attitudes toward composting and their waste management practices.

The project and lecture groups showed significant increases in average test-scores, with the post-project increase (20.9 points) being higher than the post-lecture increase (12.3 points). The questionnaire revealed that nonorganic waste recycling was practiced irregularly, while food waste was reused as livestock feed by 38% of the students. Composting was not common, but 23% of the students in the project group started household composting during the project. The students who were most satisfied with the project outcomes were willing to spend higher prices for a composting box (p = 0.036), showing a high correlation between awareness raising and environmental sustainability practices.

The project-based learning approach had more impact than the traditional lecture in teaching environmental sustainability to the students. The project succeeded in improving students' composting knowledge and increased their interest in continuing the composting practices at home.

The study is the first attempt to measure the direct impact of composting education on Emirati students' knowledge of, and interest in environmental sustainable practices, vis-à-vis composting.

The Gulf Cooperation Council member countries not only generate the highest quantity of municipal solid waste (MSW) per capita when compared globally, but also in most of these countries, such waste is just dumped at different landfill stations. In Oman, the total quantity of MSW stood at 2.0 million tons per year. The emission from this waste is estimated at 2,181,034 tons/year (carbon dioxide equivalent). This article attempts to develop frameworks that considered landfilling, composting and recycling of MSW.

To know the composition of the municipal solid waste in Oman, a quantitative research method was employed. The greenhouse gas (GHG) emissions from MSWM in this study focus on three major gases, CO₂, CH₄ and N₂O. The Intergovernmental Panel on Climate Change (IPCC) 2006 model is used to calculate GHG emissions from landfills and composting (IPCC, 2006). Four frameworks – baseline F0, framework F1, framework F2 and framework F3 – are outlined in this paper. The F0 represents the current situation of the MSW in which most of the waste goes to landfills and dumpsites. In F1, improved MSW collection service and landfilling are incorporated and open burning is restricted. The F2 considered landfilling and composting, while F3 is based on landfilling, composting and recycling.

The framework F2, which proposes the composting process for the organic waste which normally goes to landfills, results in the reduction of emissions by 40% as compared to landfill practice. Similarly, the samples of MSW collected in Oman show a good amount of recycling waste. The framework F3, which considers the landfill, composting and recycling, reduced the total GHG emissions from 2,181,034 tons/year to 1,427,998 tons/year (carbon dioxide equivalent), representing a total reduction of 35% in emissions.

Different values such as CH₄ correction factor, the fraction of degradable organic carbon and the fraction of DOC used to determine the GHG emissions from MSW considering landfilling, composting and recycling based on the IPPC model and existing literature review. The actual determination of these values based on the Oman conditions may result in more accurate emissions from MSW in Oman.

Different frameworks suggested in this research have different practical implications; however, the final framework F3, which produces fewer emissions, required a material recovery facility to recycle the MSW in Oman. For framework F3, it is important that the residents in Oman have enough knowledge and willingness to do the waste segregation at the household level. Apparently, such knowledge and willingness need to be determined through a separate study.

The frameworks F2 and F3 are considered to be more suitable solutions compared to the current practices for Oman and other gulf countries to reduce its per capita emissions from MSW and protect its local environment. There is a potential for further work that needs to explore the possible solutions to implement the suggested frameworks.

The purpose of this paper is to investigate the practices that start-ups in emerging economies can implement to design circular economy business models and how they can create and capture value from a circular economy business model.

The paper adopts a qualitative case method approach with semi-structured interviews with start-up founder promoters, its employees, its beneficiaries and its customers, conducted in two local Indian start-ups engaged in the manufacture of products and providing services that promote adoption of circular economy principles.

Analysis of the two business models reveals common patterns in building value proposition. The findings suggest that start-up ventures adopt an iterative approach to produce reusable and interlinked products and co-create with customers, vendors and local communities. They adopt mechanisms that can create, deliver and capture value while maintaining economic viability, and thus contribute towards micro- and macro-level benefits.

This study maximizes the depth of the phenomenon under investigation by leveraging case study methodology. Future research opportunities could be found in quantitative studies to increase the generalizability of the findings of this paper.

The paper presents a theoretical model linking the circular business model design and deployment mechanisms that can be used by start-up entrepreneurs desirous of embracing circular economy principles and thus contribute towards environmental, economic and developmental goals in emerging economies.

To accelerate the transition of adoption of circularity principles in emerging markets, start-up ventures could adopt circular business models that contribute towards achieving positive behavioural change. This can be achieved by integrating with different stakeholders in the value network such that they play a vital role in the process of value creation and delivery and benefit from the value captured.

An interdisciplinary approach that integrates the research streams of circular economy, and business model design has been pursued to identify the design and deployment mechanisms adopted in the circular business models of start-ups in real-world emerging economies’ context.

Ecosystem-based livelihood diversification (ESLD) approaches have been identified as one of the best solutions to alleviate poverty and improve living standards in rural communities in developing nations. This study aims to elucidate the motivations that drive Sri Lankan women in rural agri-based community to adopt ESLD activities.

The sustainable livelihood approach (SLA) five pillars were used as a theoretical framework. This study was carried out with women living in farmer families located in Anuradhapura District, Sri Lanka. A purposive sampling technique was used, and semistructured interviews were performed with 46 women in a noncontrived setting. Deductive content analysis approach was used for answering research questions.

Making handcrafts using different plants, composting and home gardening are the major sources of ESLD of women in the study areas. Under the SLA factors, human resources include family size, education, vocational training, age and attitude. Social resources like participation in community work, family support received and becoming members in cooperatives encourage the women to partake in ESLD. Nonagriculture natural resources were considered as an incentive to engage in ESLD. Satisfaction with the income generated by the livelihood, other income sources and loans from the informal sector were the vital financial resources. Regarding the physical resources, the respondents were profound with infrastructure, marketplaces, training centers and tools/equipment.

Knowing the existing ESLD strategies and pointing out the determinant factors affecting women in practicing ESLD activities are unquestionably important in the provision of information to formulate an appropriate strategy for the development of the rural agri-based community.

Little is known about the ESLD efforts and the extent of adoption of ESLD practices by women in rural communities. The findings based on the SLA framework help to understand what is happening in livelihood diversifications in agri-based community and suggest important implications for the development of ESLD for the future.

The purpose of this paper is to evaluate how improvements in municipal solid waste management systems (MSWMS) can contribute to a transition toward circular economy (CE) in urban areas, outlining actions and guidelines for public policies.

The research was carried out in three municipalities located in the state of São Paulo in terms of: diagnosis; elaboration of more positive scenarios in terms of CE and scaling of economic and environmental benefits; and outline actions and guidelines for public policies of MSWMS.

In developing countries like Brazil, MSWMS can contribute to a transition toward a CE through new public policies and management practices, or even through the improvement of those that already exist. Examples of this are the integration of the informal sector of the recycling chain and service sector related to repairs of clothing, shoes, furniture and electronics as well as composting at the food production site. This could be strengthened by legal and financial mechanisms, training and carbon credit projects. Moreover, there is a need for integration of public policies between different levels of governments and sectoral policies.

This paper developed a methodology to examine the potential for a transition toward a CE through the MSWMS in different scenarios and cities. This methodology allows to advance the implementation of the concept of CE in urban areas of developing countries and generating co-benefits to the local economy and the global environment.

The aim of this paper is to assess the trend of changes of nutritional status and environmental quality of different decomposing organic wastes in different phases of vermicomposting utilizing an indigenous earthworm's species Perionyx excavatus.

Four different organic wastes were selected as basic ingredients for vermicompost production. Dried waste materials (2 kg) of each were mixed with dried cow dung and placed in experimental plastic trays with 60 individuals of selected earthworm species. Samples were collected from each tray at an interval of 15 days. Six trays were used: three were with both wastes, three trays having only wastes were treated as control.

Regression equation has shown the rate of change of nutrients – both in control and experiment vermicomposting units over time – which revealed significant changes of C, N, P and C/N ratio during different phases of vermicomposting.

Vermitechnology is now being considered as an eco‐friendly, user‐friendly and cost‐effective biotechnological tool for the conversion of decomposable organic wastes into valuable organic manure, ensuring pollution abatement, self employment and sustainability in agriculture.

The paper helps to identify the potential of locally available earthworm species and organic materials for the mass production of vermicompost involving local peoples and locally available bioresources.

This study aims to analyze the challenges startups face in implementing business models for sustainability. In particular, the research question of this study is: How do the challenges faced by startups affect business models for sustainability in the context of an emerging country?

Startups are increasingly incorporating ways to thrive in a competitive environment with innovative sustainable business models, a key factor for competitive advantage and corporate sustainability. This paper analyses startups’ challenges in adopting business models for sustainability through a case study in two startups, using the sustainable value exchange matrix (SVEM) tool through workshops, to carry out the diagnosis of these challenges.

The barriers and challenges of business models for sustainability in startups were found in different categories, where the main barriers are linked to the institutional category, the organizational and the market and sales culture. Thus, the authors concluded that there is a need to reformulate public policies and to have greater participation of the actors involved.

The main limitation of the research is the number of case studies (only two), which makes it difficult to generalize the results.

The research presents two major contributions. First, through the case studies, it is possible to verify that the barriers and challenges in business models for sustainability have relevance for startups. The second contribution is the adaptation of SVEM in conducting the debate by incorporating the barriers and challenges in value creation and delivery system.

This study contributes to the business models for sustainability literature to better understand the challenges startups face in practice and can serve as insights to help overcome them. As this is an empirical study, the information gathered can help create metrics and public policies to achieve the United Nations sustainable development goals.

The present research has as originality the analysis of the challenges in startups in implementing business models for sustainability and their relationships with the value proposition, capture and creation, as well as and delivery (adapted to the challenges found in the literature) applying the SVEM tool proposed by Morioka et al. (2018).

Food waste at the household level represents a major component of all food waste. Therefore minimizing food waste at the household level remains an important component of the food chain responsibility. This study explores the problem of food waste in Mauritius through an understanding of households' attitudes toward food waste and their motivations and barriers to food waste recycling.

The study uses a grounded theory approach to identify thematic categories that represent participants' attitudes toward food waste and the barriers they face to food waste reduction. We used a purposive sampling technique to guide the selection of participants. Interviews were conducted with 14 participants: three experts in food waste and 11 households. The data were analyzed using the tools of grounded theory.

Participants' expressed views on food waste included (1) guilt toward wasting food; (2) (lack of) environmental awareness; (3) financial considerations and (4) exemption from responsibility. The findings also led to the development of four themes that defined the barriers participants face to recycling food waste: (1) lack of awareness; (2) space limitations on recycling methods; (3) inadequate policy and (4) lack of time/priority.

Addressing the problem of food waste requires a holistic approach that takes into account households' attitudes to food waste, their motivation and barriers to food waste recycling as well as the regulatory and institutional framework governing food waste management in Mauritius. Policymakers should try to improve households' knowledge about food waste through educational campaigns. The authorities can provide different types of bins to households freely to facilitate the sorting out of waste and impose a fee for food waste generated beyond a certain limit or provide subsidies to them for handling food waste properly.

The management of food waste is particularly challenging for small islands developing states because of their unique characteristics of smallness, limited resources and environmental vulnerability. Appropriate interventions to reduce household food waste require place-based and geographically sensitive analyses that take into account the specificities of local food and waste management systems and cultural norms with respect to food. However, there is not only a paucity of research on household food waste, but most studies have been carried out in nonisland economies. The study contributes to the limited research on household food waste in small islands.

Chapter 5 deals with key drivers allowing waste management systems to meet circular economy goals, targeting a zero waste approach aimed at eliminating waste and changing the concept of waste into secondary materials. Case studies around Europe highlighted conditions and drivers of sustainable urban solid waste management systems; innovation, responsibility, stakeholder engagement, and knowledge sharing are factors enabling effective and viable urban waste management.