Author: Jonathan W-C Wong
Publisher:
ISBN: 9780784414101
Category : Refuse and refuse disposal
Languages : en
Pages : 728
Book Description
Sustainable Solid Waste Management
Author: Jonathan W-C Wong
Publisher:
ISBN: 9780784414101
Category : Refuse and refuse disposal
Languages : en
Pages : 728
Book Description
Publisher:
ISBN: 9780784414101
Category : Refuse and refuse disposal
Languages : en
Pages : 728
Book Description
Municipal Solid Waste
Author: Nikolaos Tzortzakis
Publisher:
ISBN: 9781536118650
Category : Refuse and refuse disposal
Languages : en
Pages : 0
Book Description
Solid waste has grown into a relatively difficult problem to solve for those responsible for its management; these responsibilities include the collection, transport, treatment, and disposal of solid wastes, particularly wastes generated in medium and large urban centres. This problem is even more intense in economically developing countries, where the financial, human, and other critical resources are scarce in general. In the last decade, there has been a great interest and awareness regarding the environmentally safe management of waste worldwide, centralised in legislative, administrative, standardisation, and research activities in this field. Therefore, it is essential to develop short- and long-term waste management strategies (often named the 3Rs) and their consequent implementation in compliance with the formulated priorities for waste: (1) Reduce, (2) Recycle, (3) Reuse and (4) environmentally safe disposal. Several contradictions and lack of agreement still exist, even regarding the major basic definitions, e.g., which material should be treated as "waste" and which as a "beneficial raw material", which wastes are "hazardous" and which are "non-hazardous", etc. Quite often, different approaches and as a consequence, waste management/disposals are adopted for the same situation/materials. Environmental risk assessment procedures and mode of actions are varied greatly not only within national levels, but also at regional levels within the same country by different groups of scientists and/or policy makers. The general idea of the book has arisen from the mutual experience of many specialists in numerous disciplines from different countries involved in the problem of environmental assessment, economic and monitoring approaches, and control approaches for chemicals generated from solid waste disposal. Solid waste worldwide issues nowadays reflect the complexity and unbalanced development of our world at the beginning of the 21st century. This book covers a broad group of wastes, from biowaste to hazardous waste. The contributors to the book are recognised experts in the diverse fields associated with the issues of waste management and the reuse-recycle of materials, and are from different parts of the world. Authors present their experience and approaches considering both international and national/local specifics. The book is addressed to the wide range of end-users, decision-makers and professionals involved in environmental and agricultural issues: administration, designers, manufacturers, policy makers, farmers, researchers, academics and university students, and is focused on waste properties, environmental behaviour and management in an environmentally safe way. It was not the intention of the editor/authors to exhaust the subject, which is intensely broad, but to give a general idea with updating trends in the field of solid waste management concerning disposal, monitoring, assessment and remedial options, which are demonstrated also in case studies. The authors hope that this book to some extent will contribute to the trials and efforts for the proper, environmentally safe practices of solid waste disposal, and will provide state-of-the-art information and discussion, monitoring strategies, advanced approaches and methods, techniques and equipment for environmentally safe disposal and remediation of solid wastes.
Publisher:
ISBN: 9781536118650
Category : Refuse and refuse disposal
Languages : en
Pages : 0
Book Description
Solid waste has grown into a relatively difficult problem to solve for those responsible for its management; these responsibilities include the collection, transport, treatment, and disposal of solid wastes, particularly wastes generated in medium and large urban centres. This problem is even more intense in economically developing countries, where the financial, human, and other critical resources are scarce in general. In the last decade, there has been a great interest and awareness regarding the environmentally safe management of waste worldwide, centralised in legislative, administrative, standardisation, and research activities in this field. Therefore, it is essential to develop short- and long-term waste management strategies (often named the 3Rs) and their consequent implementation in compliance with the formulated priorities for waste: (1) Reduce, (2) Recycle, (3) Reuse and (4) environmentally safe disposal. Several contradictions and lack of agreement still exist, even regarding the major basic definitions, e.g., which material should be treated as "waste" and which as a "beneficial raw material", which wastes are "hazardous" and which are "non-hazardous", etc. Quite often, different approaches and as a consequence, waste management/disposals are adopted for the same situation/materials. Environmental risk assessment procedures and mode of actions are varied greatly not only within national levels, but also at regional levels within the same country by different groups of scientists and/or policy makers. The general idea of the book has arisen from the mutual experience of many specialists in numerous disciplines from different countries involved in the problem of environmental assessment, economic and monitoring approaches, and control approaches for chemicals generated from solid waste disposal. Solid waste worldwide issues nowadays reflect the complexity and unbalanced development of our world at the beginning of the 21st century. This book covers a broad group of wastes, from biowaste to hazardous waste. The contributors to the book are recognised experts in the diverse fields associated with the issues of waste management and the reuse-recycle of materials, and are from different parts of the world. Authors present their experience and approaches considering both international and national/local specifics. The book is addressed to the wide range of end-users, decision-makers and professionals involved in environmental and agricultural issues: administration, designers, manufacturers, policy makers, farmers, researchers, academics and university students, and is focused on waste properties, environmental behaviour and management in an environmentally safe way. It was not the intention of the editor/authors to exhaust the subject, which is intensely broad, but to give a general idea with updating trends in the field of solid waste management concerning disposal, monitoring, assessment and remedial options, which are demonstrated also in case studies. The authors hope that this book to some extent will contribute to the trials and efforts for the proper, environmentally safe practices of solid waste disposal, and will provide state-of-the-art information and discussion, monitoring strategies, advanced approaches and methods, techniques and equipment for environmentally safe disposal and remediation of solid wastes.
Sustainable Solutions for Environmental Pollution, Volume 1
Author: Nour Shafik El-Gendy
Publisher: John Wiley & Sons
ISBN: 1119785359
Category : Technology & Engineering
Languages : en
Pages : 514
Book Description
SUSTAINABLE SOLUTIONS FOR ENVIRONMENTAL POLLUTION This first volume in a broad, comprehensive two-volume set, Sustainable Solutions for Environmental Pollution, concentrates on the role of waste management in solving pollution problems and the value-added products that can be created out of waste, turning a negative into an environmental and economic positive. Environmental pollution is one of the biggest problems facing our world today, in every country, region, and even down to local landfills. Not just solving these problems, but turning waste into products, even products that can make money, is a huge game-changer in the world of environmental engineering. Finding ways to make fuel and other products from solid waste, setting a course for the production of future biorefineries, and creating a clean process for generating fuel and other products are just a few of the topics covered in the groundbreaking new first volume in the two-volume set, Sustainable Solutions for Environmental Pollution. The valorization of waste, including the creation of biofuels, turning waste cooking oil into green chemicals, providing sustainable solutions for landfills, and many other topics are also covered in this extensive treatment on the state of the art of this area in environmental engineering. This groundbreaking new volume in this forward-thinking set is the most comprehensive coverage of all of these issues, laying out the latest advances and addressing the most serious current concerns in environmental pollution. Whether for the veteran engineer or the student, this is a must-have for any library. AUDIENCE Petroleum, chemical, process, and environmental engineers, other scientists and engineers working in the area of environmental pollution, and students at the university and graduate level studying these areas
Publisher: John Wiley & Sons
ISBN: 1119785359
Category : Technology & Engineering
Languages : en
Pages : 514
Book Description
SUSTAINABLE SOLUTIONS FOR ENVIRONMENTAL POLLUTION This first volume in a broad, comprehensive two-volume set, Sustainable Solutions for Environmental Pollution, concentrates on the role of waste management in solving pollution problems and the value-added products that can be created out of waste, turning a negative into an environmental and economic positive. Environmental pollution is one of the biggest problems facing our world today, in every country, region, and even down to local landfills. Not just solving these problems, but turning waste into products, even products that can make money, is a huge game-changer in the world of environmental engineering. Finding ways to make fuel and other products from solid waste, setting a course for the production of future biorefineries, and creating a clean process for generating fuel and other products are just a few of the topics covered in the groundbreaking new first volume in the two-volume set, Sustainable Solutions for Environmental Pollution. The valorization of waste, including the creation of biofuels, turning waste cooking oil into green chemicals, providing sustainable solutions for landfills, and many other topics are also covered in this extensive treatment on the state of the art of this area in environmental engineering. This groundbreaking new volume in this forward-thinking set is the most comprehensive coverage of all of these issues, laying out the latest advances and addressing the most serious current concerns in environmental pollution. Whether for the veteran engineer or the student, this is a must-have for any library. AUDIENCE Petroleum, chemical, process, and environmental engineers, other scientists and engineers working in the area of environmental pollution, and students at the university and graduate level studying these areas
Improving Municipal Solid Waste Management in India
Author: P U Asnani
Publisher: World Bank Publications
ISBN: 0821373625
Category : Technology & Engineering
Languages : en
Pages : 190
Book Description
Solid Waste Management (SWM) is a matter of great concern in the urban areas of developing countries. The municipal authorities who are responsible for managing municipal solid waste are unable to discharge their obligations effectively because they lack the in-house capacity to handle the complexities of the process. It is heartening to see that the World Bank has prepared this book covering all important aspects of municipal SWM in great depth. The book covers very lucidly the present scenario of SWM in urban areas, the system deficiencies that exist, and the steps that need to be taken to correct SWM practices in compliance with Municipal Solid Waste (Management and Handling) Rules 2000 ratified by the Government of India. The book shares examples of best practices adopted in various parts of the country and abroad, and very appropriately covers the institutional, financial, social, and legal aspects of solid waste management, which are essential for sustainability of the system. It provides a good insight on how to involve the community, nongovernmental organizations, and the private sector to help improve the efficiency and cost effectiveness of the service, and shows how contracting mechanisms can be used to involve the private sector in SWM services. This book will be a very useful tool for city managers and various stakeholders who deal with municipal solid waste management in the design and execution of appropriate and cost-effective systems.
Publisher: World Bank Publications
ISBN: 0821373625
Category : Technology & Engineering
Languages : en
Pages : 190
Book Description
Solid Waste Management (SWM) is a matter of great concern in the urban areas of developing countries. The municipal authorities who are responsible for managing municipal solid waste are unable to discharge their obligations effectively because they lack the in-house capacity to handle the complexities of the process. It is heartening to see that the World Bank has prepared this book covering all important aspects of municipal SWM in great depth. The book covers very lucidly the present scenario of SWM in urban areas, the system deficiencies that exist, and the steps that need to be taken to correct SWM practices in compliance with Municipal Solid Waste (Management and Handling) Rules 2000 ratified by the Government of India. The book shares examples of best practices adopted in various parts of the country and abroad, and very appropriately covers the institutional, financial, social, and legal aspects of solid waste management, which are essential for sustainability of the system. It provides a good insight on how to involve the community, nongovernmental organizations, and the private sector to help improve the efficiency and cost effectiveness of the service, and shows how contracting mechanisms can be used to involve the private sector in SWM services. This book will be a very useful tool for city managers and various stakeholders who deal with municipal solid waste management in the design and execution of appropriate and cost-effective systems.
Handbook of Research on Safe Disposal Methods of Municipal Solid Wastes for a Sustainable Environment
Author: Srivastava, Prateek
Publisher: IGI Global
ISBN: 1668481197
Category : Technology & Engineering
Languages : en
Pages : 444
Book Description
Managing solid waste is one of the biggest challenges in urban areas around the world. Technologically advanced economies generate vast amounts of organic waste materials, many of which are disposed of in landfills. In the future, efficient use of carbon-containing waste and all other waste materials must be increased to reduce the need for virgin raw materials acquisition, including biomass, and reduce carbon emissions to the atmosphere, mitigating climate change. Moreover, expeditious development in information and communications technology (ICT) has made the machines more powerful and efficient, but at the same time, there is a simultaneous decrease in product life leading to an extensive rise in the annual production of e-waste, or electronic waste. Considering the health hazards and environmental implications of e-waste, it has become a global problem that needs serious attention. The Handbook of Research on Safe Disposal Methods of Municipal Solid Wastes for a Sustainable Environment covers waste management principles and strategies in different fields and corresponding applications. The book also focuses on the waste management strategies for a sustainable environment that have emerged. Covering key topics such as waste, energy, and recycling, this premier reference source is an excellent resource for environmentalists, government officials, researchers, scholars, academicians, practitioners, instructors, and students.
Publisher: IGI Global
ISBN: 1668481197
Category : Technology & Engineering
Languages : en
Pages : 444
Book Description
Managing solid waste is one of the biggest challenges in urban areas around the world. Technologically advanced economies generate vast amounts of organic waste materials, many of which are disposed of in landfills. In the future, efficient use of carbon-containing waste and all other waste materials must be increased to reduce the need for virgin raw materials acquisition, including biomass, and reduce carbon emissions to the atmosphere, mitigating climate change. Moreover, expeditious development in information and communications technology (ICT) has made the machines more powerful and efficient, but at the same time, there is a simultaneous decrease in product life leading to an extensive rise in the annual production of e-waste, or electronic waste. Considering the health hazards and environmental implications of e-waste, it has become a global problem that needs serious attention. The Handbook of Research on Safe Disposal Methods of Municipal Solid Wastes for a Sustainable Environment covers waste management principles and strategies in different fields and corresponding applications. The book also focuses on the waste management strategies for a sustainable environment that have emerged. Covering key topics such as waste, energy, and recycling, this premier reference source is an excellent resource for environmentalists, government officials, researchers, scholars, academicians, practitioners, instructors, and students.
Environmental and Health Impact of Solid Waste Management Activities
Author: R M Harrison
Publisher: Royal Society of Chemistry
ISBN: 1847550762
Category : Technology & Engineering
Languages : en
Pages : 228
Book Description
Solid waste management issues are a highly emotive topic. Disposal costs need to be balanced against environmental impact, which often results in heated public debate. Disposal options such as incineration and landfill, whilst unpopular with both the public and environmental pressure groups, do not pose the same environmental and health risks as, for example, recycling plants. This book, written by international experts, discusses the various waste disposal options that are available (landfill, incineration, composting, recycling) and then reviews their impact on the environment, and particularly on human health. Comprehensive and highly topical, Environmental and Health Impact of Solid Waste Management Activities will make a strong contribution to scientific knowledge in the area, and will be of value to scientists and policy-makers in particular.
Publisher: Royal Society of Chemistry
ISBN: 1847550762
Category : Technology & Engineering
Languages : en
Pages : 228
Book Description
Solid waste management issues are a highly emotive topic. Disposal costs need to be balanced against environmental impact, which often results in heated public debate. Disposal options such as incineration and landfill, whilst unpopular with both the public and environmental pressure groups, do not pose the same environmental and health risks as, for example, recycling plants. This book, written by international experts, discusses the various waste disposal options that are available (landfill, incineration, composting, recycling) and then reviews their impact on the environment, and particularly on human health. Comprehensive and highly topical, Environmental and Health Impact of Solid Waste Management Activities will make a strong contribution to scientific knowledge in the area, and will be of value to scientists and policy-makers in particular.
Safe Disposal Methods of Municipal Solid Wastes for a Sustainable Environment
Author: Prateek Srivastava
Publisher:
ISBN: 9781668481189
Category : Refuse and refuse disposal
Languages : en
Pages : 0
Book Description
"There are several research papers in the scientific literature about specific waste streams, to quantify their effect on the environment in a wide range of fields. However, till now, no systematic efforts have been made to come out with a book which exclusively covers waste management principles and strategies in different fields and corresponding applications. We will try to club different types of waste and waste management strategies in this book so that a reader can look at the range of materials in a single book. The book chapters including results and case studies can be of reference for academicians, researchers and stakeholders for quantifying the comprehensive impacts and for planning integrated solid waste collection and treatment systems, for improving sustainability at a global level. The main objectives are: 1. To improve and manage solid waste systems through the application of modern management techniques. 2. To provide information about the application of waste management strategies in different interdisciplinary areas such as municipal solid waste, plastic waste, bio-medical wastes, hazardous wastes, e-wastes, soil remediation technologies, environmental impact assessment and many more. 3. To focus on the waste management strategies for a sustainable environment that have usually emerged in a decade or two. 4. To cover the content from basic fundamental to complex application logically for a better understanding of the reader. 5. To present the latest information on the increase in solid and hazardous wastes due to economic growth, urbanization, and industrialization. To discuss the main challenge for governments of different nations and international organizations to develop environment-friendly strategies for efficient waste management to save human beings and the environment from its adverse effects"--
Publisher:
ISBN: 9781668481189
Category : Refuse and refuse disposal
Languages : en
Pages : 0
Book Description
"There are several research papers in the scientific literature about specific waste streams, to quantify their effect on the environment in a wide range of fields. However, till now, no systematic efforts have been made to come out with a book which exclusively covers waste management principles and strategies in different fields and corresponding applications. We will try to club different types of waste and waste management strategies in this book so that a reader can look at the range of materials in a single book. The book chapters including results and case studies can be of reference for academicians, researchers and stakeholders for quantifying the comprehensive impacts and for planning integrated solid waste collection and treatment systems, for improving sustainability at a global level. The main objectives are: 1. To improve and manage solid waste systems through the application of modern management techniques. 2. To provide information about the application of waste management strategies in different interdisciplinary areas such as municipal solid waste, plastic waste, bio-medical wastes, hazardous wastes, e-wastes, soil remediation technologies, environmental impact assessment and many more. 3. To focus on the waste management strategies for a sustainable environment that have usually emerged in a decade or two. 4. To cover the content from basic fundamental to complex application logically for a better understanding of the reader. 5. To present the latest information on the increase in solid and hazardous wastes due to economic growth, urbanization, and industrialization. To discuss the main challenge for governments of different nations and international organizations to develop environment-friendly strategies for efficient waste management to save human beings and the environment from its adverse effects"--
Sustainable Resource Recovery and Zero Waste Approaches
Author: Mohammad Taherzadeh
Publisher: Elsevier
ISBN: 0444642838
Category : Technology & Engineering
Languages : en
Pages : 306
Book Description
Sustainable Resource Recovery and Zero Waste Approaches covers waste reduction, biological, thermal and recycling methods of waste recovery, and their conversion into a variety of products. In addition, the social, economic and environmental aspects are also explored, making this a useful textbook for environmental courses and a reference book for both universities and companies. - Provides a novel approach on how to achieve zero wastes in a society - Shows the roadmap on achieving Sustainable Development Goals - Considers critical aspects of municipal waste management - Covers recent developments in waste biorefinery, thermal processes, anaerobic digestion, material recycling and landfill mining
Publisher: Elsevier
ISBN: 0444642838
Category : Technology & Engineering
Languages : en
Pages : 306
Book Description
Sustainable Resource Recovery and Zero Waste Approaches covers waste reduction, biological, thermal and recycling methods of waste recovery, and their conversion into a variety of products. In addition, the social, economic and environmental aspects are also explored, making this a useful textbook for environmental courses and a reference book for both universities and companies. - Provides a novel approach on how to achieve zero wastes in a society - Shows the roadmap on achieving Sustainable Development Goals - Considers critical aspects of municipal waste management - Covers recent developments in waste biorefinery, thermal processes, anaerobic digestion, material recycling and landfill mining
What a Waste 2.0
Author: Silpa Kaza
Publisher: World Bank Publications
ISBN: 1464813477
Category : Science
Languages : en
Pages : 244
Book Description
Solid waste management affects every person in the world. By 2050, the world is expected to increase waste generation by 70 percent, from 2.01 billion tonnes of waste in 2016 to 3.40 billion tonnes of waste annually. Individuals and governments make decisions about consumption and waste management that affect the daily health, productivity, and cleanliness of communities. Poorly managed waste is contaminating the world’s oceans, clogging drains and causing flooding, transmitting diseases, increasing respiratory problems, harming animals that consume waste unknowingly, and affecting economic development. Unmanaged and improperly managed waste from decades of economic growth requires urgent action at all levels of society.What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050 aggregates extensive solid aste data at the national and urban levels. It estimates and projects waste generation to 2030 and 2050. Beyond the core data metrics from waste generation to disposal, the report provides information on waste management costs, revenues, and tariffs; special wastes; regulations; public communication; administrative and operational models; and the informal sector.Solid waste management accounts for approximately 20 percent of municipal budgets in low-income countries and 10 percent of municipal budgets in middle-income countries, on average. Waste management is often under the jurisdiction of local authorities facing competing priorities and limited resources and capacities in planning, contract management, and operational monitoring. These factors make sustainable waste management a complicated proposition; most low- and middle-income countries, and their respective cities, are struggling to address these challenges.Waste management data are critical to creating policy and planning for local contexts. Understanding how much waste is generated—especially with rapid urbanization and population growth—as well as the types of waste generated helps local governments to select appropriate management methods and plan for future demand. It allows governments to design a system with a suitable number of vehicles, establish efficient routes, set targets for diversion of waste, track progress, and adapt as consumption patterns change. With accurate data, governments can realistically allocate resources, assess relevant technologies, and consider strategic partners for service provision, such as the private sector or nongovernmental organizations.What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050 provides the most up-to-date information available to empower citizens and governments around the world to effectively address the pressing global crisis of waste. Additional information is available at http://www.worldbank.org/what-a-waste.
Publisher: World Bank Publications
ISBN: 1464813477
Category : Science
Languages : en
Pages : 244
Book Description
Solid waste management affects every person in the world. By 2050, the world is expected to increase waste generation by 70 percent, from 2.01 billion tonnes of waste in 2016 to 3.40 billion tonnes of waste annually. Individuals and governments make decisions about consumption and waste management that affect the daily health, productivity, and cleanliness of communities. Poorly managed waste is contaminating the world’s oceans, clogging drains and causing flooding, transmitting diseases, increasing respiratory problems, harming animals that consume waste unknowingly, and affecting economic development. Unmanaged and improperly managed waste from decades of economic growth requires urgent action at all levels of society.What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050 aggregates extensive solid aste data at the national and urban levels. It estimates and projects waste generation to 2030 and 2050. Beyond the core data metrics from waste generation to disposal, the report provides information on waste management costs, revenues, and tariffs; special wastes; regulations; public communication; administrative and operational models; and the informal sector.Solid waste management accounts for approximately 20 percent of municipal budgets in low-income countries and 10 percent of municipal budgets in middle-income countries, on average. Waste management is often under the jurisdiction of local authorities facing competing priorities and limited resources and capacities in planning, contract management, and operational monitoring. These factors make sustainable waste management a complicated proposition; most low- and middle-income countries, and their respective cities, are struggling to address these challenges.Waste management data are critical to creating policy and planning for local contexts. Understanding how much waste is generated—especially with rapid urbanization and population growth—as well as the types of waste generated helps local governments to select appropriate management methods and plan for future demand. It allows governments to design a system with a suitable number of vehicles, establish efficient routes, set targets for diversion of waste, track progress, and adapt as consumption patterns change. With accurate data, governments can realistically allocate resources, assess relevant technologies, and consider strategic partners for service provision, such as the private sector or nongovernmental organizations.What a Waste 2.0: A Global Snapshot of Solid Waste Management to 2050 provides the most up-to-date information available to empower citizens and governments around the world to effectively address the pressing global crisis of waste. Additional information is available at http://www.worldbank.org/what-a-waste.
Handbook of Research on Waste Management Techniques for Sustainability
Author: Akkucuk, Ulas
Publisher: IGI Global
ISBN: 1466697245
Category : Technology & Engineering
Languages : en
Pages : 465
Book Description
Sustainability is a growing area of research in ecology, economics, environmental science, business, and cultural studies. Specifically, sustainable waste disposal and management is a growing concern as both solid and liquid wastes are rapidly expanding in direct correlation with population growth and improved economic conditions across regions. The Handbook of Research on Waste Management Techniques for Sustainability explores the topic of sustainable development in an era where domestic and municipal waste is becoming a concern for both human and environmental health. Highlighting a number of topics relating to pollution, green initiatives, and waste reduction in both the public and private sector, this research-based publication is designed for use by environmental scientists, business executives, researchers, graduate-level students, and policymakers seeking the latest information on sustainability in business, medicine, agriculture, and society.
Publisher: IGI Global
ISBN: 1466697245
Category : Technology & Engineering
Languages : en
Pages : 465
Book Description
Sustainability is a growing area of research in ecology, economics, environmental science, business, and cultural studies. Specifically, sustainable waste disposal and management is a growing concern as both solid and liquid wastes are rapidly expanding in direct correlation with population growth and improved economic conditions across regions. The Handbook of Research on Waste Management Techniques for Sustainability explores the topic of sustainable development in an era where domestic and municipal waste is becoming a concern for both human and environmental health. Highlighting a number of topics relating to pollution, green initiatives, and waste reduction in both the public and private sector, this research-based publication is designed for use by environmental scientists, business executives, researchers, graduate-level students, and policymakers seeking the latest information on sustainability in business, medicine, agriculture, and society.