Author: Mark Diesendorf
Publisher: UNSW Press
ISBN: 1742241689
Category : Science
Languages : en
Pages : 273
Book Description
This book is a call to action on climate change, filled with clear and detailed information on the strategies we need to adopt to ensure a sustainable future for the planet. Unlike other books on the subject, it brings together both the technology and policy issues to provide a truly interdisciplinary approach. Mark Diesendorf provides a guide to our future energy options, outlining the enormous recent changes in the energy sector in Australia and internationally. Diesendorf argues that we now have the technologies needed to transform our fossil-fuel based energy systems into an ecologically sustainable one, based on the efficient use of renewable energy. All we need is the political will to do so.
Sustainable Energy Solutions for Climate Change
Author: Mark Diesendorf
Publisher: UNSW Press
ISBN: 1742241689
Category : Science
Languages : en
Pages : 273
Book Description
This book is a call to action on climate change, filled with clear and detailed information on the strategies we need to adopt to ensure a sustainable future for the planet. Unlike other books on the subject, it brings together both the technology and policy issues to provide a truly interdisciplinary approach. Mark Diesendorf provides a guide to our future energy options, outlining the enormous recent changes in the energy sector in Australia and internationally. Diesendorf argues that we now have the technologies needed to transform our fossil-fuel based energy systems into an ecologically sustainable one, based on the efficient use of renewable energy. All we need is the political will to do so.
Publisher: UNSW Press
ISBN: 1742241689
Category : Science
Languages : en
Pages : 273
Book Description
This book is a call to action on climate change, filled with clear and detailed information on the strategies we need to adopt to ensure a sustainable future for the planet. Unlike other books on the subject, it brings together both the technology and policy issues to provide a truly interdisciplinary approach. Mark Diesendorf provides a guide to our future energy options, outlining the enormous recent changes in the energy sector in Australia and internationally. Diesendorf argues that we now have the technologies needed to transform our fossil-fuel based energy systems into an ecologically sustainable one, based on the efficient use of renewable energy. All we need is the political will to do so.
How to Avoid a Climate Disaster
Author: Bill Gates
Publisher: Vintage
ISBN: 0385546149
Category : Science
Languages : en
Pages : 201
Book Description
#1 NEW YORK TIMES BEST SELLER • In this urgent, authoritative book, Bill Gates sets out a wide-ranging, practical—and accessible—plan for how the world can get to zero greenhouse gas emissions in time to avoid a climate catastrophe. Bill Gates has spent a decade investigating the causes and effects of climate change. With the help of experts in the fields of physics, chemistry, biology, engineering, political science, and finance, he has focused on what must be done in order to stop the planet's slide to certain environmental disaster. In this book, he not only explains why we need to work toward net-zero emissions of greenhouse gases, but also details what we need to do to achieve this profoundly important goal. He gives us a clear-eyed description of the challenges we face. Drawing on his understanding of innovation and what it takes to get new ideas into the market, he describes the areas in which technology is already helping to reduce emissions, where and how the current technology can be made to function more effectively, where breakthrough technologies are needed, and who is working on these essential innovations. Finally, he lays out a concrete, practical plan for achieving the goal of zero emissions—suggesting not only policies that governments should adopt, but what we as individuals can do to keep our government, our employers, and ourselves accountable in this crucial enterprise. As Bill Gates makes clear, achieving zero emissions will not be simple or easy to do, but if we follow the plan he sets out here, it is a goal firmly within our reach.
Publisher: Vintage
ISBN: 0385546149
Category : Science
Languages : en
Pages : 201
Book Description
#1 NEW YORK TIMES BEST SELLER • In this urgent, authoritative book, Bill Gates sets out a wide-ranging, practical—and accessible—plan for how the world can get to zero greenhouse gas emissions in time to avoid a climate catastrophe. Bill Gates has spent a decade investigating the causes and effects of climate change. With the help of experts in the fields of physics, chemistry, biology, engineering, political science, and finance, he has focused on what must be done in order to stop the planet's slide to certain environmental disaster. In this book, he not only explains why we need to work toward net-zero emissions of greenhouse gases, but also details what we need to do to achieve this profoundly important goal. He gives us a clear-eyed description of the challenges we face. Drawing on his understanding of innovation and what it takes to get new ideas into the market, he describes the areas in which technology is already helping to reduce emissions, where and how the current technology can be made to function more effectively, where breakthrough technologies are needed, and who is working on these essential innovations. Finally, he lays out a concrete, practical plan for achieving the goal of zero emissions—suggesting not only policies that governments should adopt, but what we as individuals can do to keep our government, our employers, and ourselves accountable in this crucial enterprise. As Bill Gates makes clear, achieving zero emissions will not be simple or easy to do, but if we follow the plan he sets out here, it is a goal firmly within our reach.
Renewable Energy Sources and Climate Change Mitigation
Author: Ottmar Edenhofer
Publisher: Cambridge University Press
ISBN: 9781107607101
Category : Science
Languages : en
Pages : 1088
Book Description
This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.
Publisher: Cambridge University Press
ISBN: 9781107607101
Category : Science
Languages : en
Pages : 1088
Book Description
This Intergovernmental Panel on Climate Change Special Report (IPCC-SRREN) assesses the potential role of renewable energy in the mitigation of climate change. It covers the six most important renewable energy sources - bioenergy, solar, geothermal, hydropower, ocean and wind energy - as well as their integration into present and future energy systems. It considers the environmental and social consequences associated with the deployment of these technologies, and presents strategies to overcome technical as well as non-technical obstacles to their application and diffusion. SRREN brings a broad spectrum of technology-specific experts together with scientists studying energy systems as a whole. Prepared following strict IPCC procedures, it presents an impartial assessment of the current state of knowledge: it is policy relevant but not policy prescriptive. SRREN is an invaluable assessment of the potential role of renewable energy for the mitigation of climate change for policymakers, the private sector, and academic researchers.
Designing Climate Solutions
Author: Hal Harvey
Publisher: Island Press
ISBN: 1610919564
Category : Technology & Engineering
Languages : en
Pages : 374
Book Description
With the effects of climate change already upon us, the need to cut global greenhouse gas emissions is nothing less than urgent. It’s a daunting challenge, but the technologies and strategies to meet it exist today. A small set of energy policies, designed and implemented well, can put us on the path to a low carbon future. Energy systems are large and complex, so energy policy must be focused and cost-effective. One-size-fits-all approaches simply won’t get the job done. Policymakers need a clear, comprehensive resource that outlines the energy policies that will have the biggest impact on our climate future, and describes how to design these policies well. Designing Climate Solutions: A Policy Guide for Low-Carbon Energy is the first such guide, bringing together the latest research and analysis around low carbon energy solutions. Written by Hal Harvey, CEO of the policy firm Energy Innovation, with Robbie Orvis and Jeffrey Rissman of Energy Innovation, Designing Climate Solutions is an accessible resource on lowering carbon emissions for policymakers, activists, philanthropists, and others in the climate and energy community. In Part I, the authors deliver a roadmap for understanding which countries, sectors, and sources produce the greatest amount of greenhouse gas emissions, and give readers the tools to select and design efficient policies for each of these sectors. In Part II, they break down each type of policy, from renewable portfolio standards to carbon pricing, offering key design principles and case studies where each policy has been implemented successfully. We don’t need to wait for new technologies or strategies to create a low carbon future—and we can’t afford to. Designing Climate Solutions gives professionals the tools they need to select, design, and implement the policies that can put us on the path to a livable climate future.
Publisher: Island Press
ISBN: 1610919564
Category : Technology & Engineering
Languages : en
Pages : 374
Book Description
With the effects of climate change already upon us, the need to cut global greenhouse gas emissions is nothing less than urgent. It’s a daunting challenge, but the technologies and strategies to meet it exist today. A small set of energy policies, designed and implemented well, can put us on the path to a low carbon future. Energy systems are large and complex, so energy policy must be focused and cost-effective. One-size-fits-all approaches simply won’t get the job done. Policymakers need a clear, comprehensive resource that outlines the energy policies that will have the biggest impact on our climate future, and describes how to design these policies well. Designing Climate Solutions: A Policy Guide for Low-Carbon Energy is the first such guide, bringing together the latest research and analysis around low carbon energy solutions. Written by Hal Harvey, CEO of the policy firm Energy Innovation, with Robbie Orvis and Jeffrey Rissman of Energy Innovation, Designing Climate Solutions is an accessible resource on lowering carbon emissions for policymakers, activists, philanthropists, and others in the climate and energy community. In Part I, the authors deliver a roadmap for understanding which countries, sectors, and sources produce the greatest amount of greenhouse gas emissions, and give readers the tools to select and design efficient policies for each of these sectors. In Part II, they break down each type of policy, from renewable portfolio standards to carbon pricing, offering key design principles and case studies where each policy has been implemented successfully. We don’t need to wait for new technologies or strategies to create a low carbon future—and we can’t afford to. Designing Climate Solutions gives professionals the tools they need to select, design, and implement the policies that can put us on the path to a livable climate future.
Renewable Energy and Wildlife Conservation
Author: Christopher E. Moorman
Publisher: JHU Press
ISBN: 1421432730
Category : Science
Languages : en
Pages : 279
Book Description
Brings together disparate conversations about wildlife conservation and renewable energy, suggesting ways these two critical fields can work hand in hand. Renewable energy is often termed simply "green energy," but its effects on wildlife and other forms of biodiversity can be quite complex. While capturing renewable resources like wind, solar, and energy from biomass can require more land than fossil fuel production, potentially displacing wildlife habitat, renewable energy infrastructure can also create habitat and promote species health when thoughtfully implemented. The authors of Renewable Energy and Wildlife Conservation argue that in order to achieve a balanced plan for addressing these two crucially important sustainability issues, our actions at the nexus of these fields must be directed by current scientific information related to the ecological effects of renewable energy production. Synthesizing an extensive, rapidly growing base of research and insights from practitioners into a single, comprehensive resource, contributors to this volume • describe processes to generate renewable energy, focusing on the Big Four renewables—wind, bioenergy, solar energy, and hydroelectric power • review the documented effects of renewable energy production on wildlife and wildlife habitats • consider current and future policy directives, suggesting ways industrial-scale renewables production can be developed to minimize harm to wildlife populations • explain recent advances in renewable power technologies • identify urgent research needs at the intersection of renewables and wildlife conservation Relevant to policy makers and industry professionals—many of whom believe renewables are the best path forward as the world seeks to meet its expanding energy needs—and wildlife conservationists—many of whom are alarmed at the rate of renewables-related habitat conversion—this detailed book culminates with a chapter underscoring emerging opportunities in renewable energy ecology. Contributors: Edward B. Arnett, Brian B. Boroski, Regan Dohm, David Drake, Sarah R. Fritts, Rachel Greene, Steven M. Grodsky, Amanda M. Hale, Cris D. Hein, Rebecca R. Hernandez, Jessica A. Homyack, Henriette I. Jager, Nicole M. Korfanta, James A. Martin, Christopher E. Moorman, Clint Otto, Christine A. Ribic, Susan P. Rupp, Jake Verschuyl, Lindsay M. Wickman, T. Bently Wigley, Victoria H. Zero
Publisher: JHU Press
ISBN: 1421432730
Category : Science
Languages : en
Pages : 279
Book Description
Brings together disparate conversations about wildlife conservation and renewable energy, suggesting ways these two critical fields can work hand in hand. Renewable energy is often termed simply "green energy," but its effects on wildlife and other forms of biodiversity can be quite complex. While capturing renewable resources like wind, solar, and energy from biomass can require more land than fossil fuel production, potentially displacing wildlife habitat, renewable energy infrastructure can also create habitat and promote species health when thoughtfully implemented. The authors of Renewable Energy and Wildlife Conservation argue that in order to achieve a balanced plan for addressing these two crucially important sustainability issues, our actions at the nexus of these fields must be directed by current scientific information related to the ecological effects of renewable energy production. Synthesizing an extensive, rapidly growing base of research and insights from practitioners into a single, comprehensive resource, contributors to this volume • describe processes to generate renewable energy, focusing on the Big Four renewables—wind, bioenergy, solar energy, and hydroelectric power • review the documented effects of renewable energy production on wildlife and wildlife habitats • consider current and future policy directives, suggesting ways industrial-scale renewables production can be developed to minimize harm to wildlife populations • explain recent advances in renewable power technologies • identify urgent research needs at the intersection of renewables and wildlife conservation Relevant to policy makers and industry professionals—many of whom believe renewables are the best path forward as the world seeks to meet its expanding energy needs—and wildlife conservationists—many of whom are alarmed at the rate of renewables-related habitat conversion—this detailed book culminates with a chapter underscoring emerging opportunities in renewable energy ecology. Contributors: Edward B. Arnett, Brian B. Boroski, Regan Dohm, David Drake, Sarah R. Fritts, Rachel Greene, Steven M. Grodsky, Amanda M. Hale, Cris D. Hein, Rebecca R. Hernandez, Jessica A. Homyack, Henriette I. Jager, Nicole M. Korfanta, James A. Martin, Christopher E. Moorman, Clint Otto, Christine A. Ribic, Susan P. Rupp, Jake Verschuyl, Lindsay M. Wickman, T. Bently Wigley, Victoria H. Zero
Drawdown
Author: Paul Hawken
Publisher: Penguin
ISBN: 1524704652
Category : Science
Languages : en
Pages : 258
Book Description
• New York Times bestseller • The 100 most substantive solutions to reverse global warming, based on meticulous research by leading scientists and policymakers around the world “At this point in time, the Drawdown book is exactly what is needed; a credible, conservative solution-by-solution narrative that we can do it. Reading it is an effective inoculation against the widespread perception of doom that humanity cannot and will not solve the climate crisis. Reported by-effects include increased determination and a sense of grounded hope.” —Per Espen Stoknes, Author, What We Think About When We Try Not To Think About Global Warming “There’s been no real way for ordinary people to get an understanding of what they can do and what impact it can have. There remains no single, comprehensive, reliable compendium of carbon-reduction solutions across sectors. At least until now. . . . The public is hungry for this kind of practical wisdom.” —David Roberts, Vox “This is the ideal environmental sciences textbook—only it is too interesting and inspiring to be called a textbook.” —Peter Kareiva, Director of the Institute of the Environment and Sustainability, UCLA In the face of widespread fear and apathy, an international coalition of researchers, professionals, and scientists have come together to offer a set of realistic and bold solutions to climate change. One hundred techniques and practices are described here—some are well known; some you may have never heard of. They range from clean energy to educating girls in lower-income countries to land use practices that pull carbon out of the air. The solutions exist, are economically viable, and communities throughout the world are currently enacting them with skill and determination. If deployed collectively on a global scale over the next thirty years, they represent a credible path forward, not just to slow the earth’s warming but to reach drawdown, that point in time when greenhouse gases in the atmosphere peak and begin to decline. These measures promise cascading benefits to human health, security, prosperity, and well-being—giving us every reason to see this planetary crisis as an opportunity to create a just and livable world.
Publisher: Penguin
ISBN: 1524704652
Category : Science
Languages : en
Pages : 258
Book Description
• New York Times bestseller • The 100 most substantive solutions to reverse global warming, based on meticulous research by leading scientists and policymakers around the world “At this point in time, the Drawdown book is exactly what is needed; a credible, conservative solution-by-solution narrative that we can do it. Reading it is an effective inoculation against the widespread perception of doom that humanity cannot and will not solve the climate crisis. Reported by-effects include increased determination and a sense of grounded hope.” —Per Espen Stoknes, Author, What We Think About When We Try Not To Think About Global Warming “There’s been no real way for ordinary people to get an understanding of what they can do and what impact it can have. There remains no single, comprehensive, reliable compendium of carbon-reduction solutions across sectors. At least until now. . . . The public is hungry for this kind of practical wisdom.” —David Roberts, Vox “This is the ideal environmental sciences textbook—only it is too interesting and inspiring to be called a textbook.” —Peter Kareiva, Director of the Institute of the Environment and Sustainability, UCLA In the face of widespread fear and apathy, an international coalition of researchers, professionals, and scientists have come together to offer a set of realistic and bold solutions to climate change. One hundred techniques and practices are described here—some are well known; some you may have never heard of. They range from clean energy to educating girls in lower-income countries to land use practices that pull carbon out of the air. The solutions exist, are economically viable, and communities throughout the world are currently enacting them with skill and determination. If deployed collectively on a global scale over the next thirty years, they represent a credible path forward, not just to slow the earth’s warming but to reach drawdown, that point in time when greenhouse gases in the atmosphere peak and begin to decline. These measures promise cascading benefits to human health, security, prosperity, and well-being—giving us every reason to see this planetary crisis as an opportunity to create a just and livable world.
Advances in Sustainable Energy
Author: Ahmad Vasel
Publisher: Springer
ISBN: 3030056368
Category : Technology & Engineering
Languages : en
Pages : 216
Book Description
This book reveals key challenges to ensuring the secure and sustainable production and use of energy resources, and provides corresponding solutions. It discusses the latest advances in renewable energy generation, and includes studies on climate change and social sustainability. In turn, the book goes beyond theory and describes practical challenges and solutions associated with energy and sustainability. In particular, it addresses: · renewable energy conversion technologies; · transmission, storage and consumption; · green buildings and the green economy; and · waste and recycling. The book presents the current state of knowledge on renewable energy and sustainability, supported by detailed examples and case studies, making it not only a cutting-edge source of information for experts and researchers in the field, but also an educational tool for related undergraduate and graduate courses.
Publisher: Springer
ISBN: 3030056368
Category : Technology & Engineering
Languages : en
Pages : 216
Book Description
This book reveals key challenges to ensuring the secure and sustainable production and use of energy resources, and provides corresponding solutions. It discusses the latest advances in renewable energy generation, and includes studies on climate change and social sustainability. In turn, the book goes beyond theory and describes practical challenges and solutions associated with energy and sustainability. In particular, it addresses: · renewable energy conversion technologies; · transmission, storage and consumption; · green buildings and the green economy; and · waste and recycling. The book presents the current state of knowledge on renewable energy and sustainability, supported by detailed examples and case studies, making it not only a cutting-edge source of information for experts and researchers in the field, but also an educational tool for related undergraduate and graduate courses.
Climate Change And Energy Options For A Sustainable Future
Author: Dinesh Kumar Srivastava
Publisher: World Scientific
ISBN: 9811233497
Category : Science
Languages : en
Pages : 364
Book Description
'This book could not be more timely — published after a year that saw the costliest slew of weather disasters in history along with one of the deadliest pandemic, the emergence and spread of which is linked to climate change ... This book will be a valuable resource for scientists, policy makers but also educators and especially a young generation of readers who want to be informed citizens shaping the right choices for their local communities but also as cosmopolitan citizens of the world.'Journal of Indian Physics AssociationThe signs of global warming can be seen everywhere — hotter summers, frequent heavy rains, prolonged droughts, more severe forest fires, fiercer storms (including snow storms) and cyclones, as well as melting polar ice caps. Our indiscriminate actions are raising the spectre of millions of climate refugees who are victims of battles for water, crops, fish, and so on. It is poignant that the poorer countries, that are the least equipped to face these calamities have contributed the least to global warming, but are the worst hit.Only a concerted effort from the entire world by a rapid transition to renewable, clean and green energy sources, while checking wastage, deforestation and pollution, and a genuine adjustment in lifestyles towards moderation can avert the Earth, the only habitable planet we know, from turning into a hothouse.
Publisher: World Scientific
ISBN: 9811233497
Category : Science
Languages : en
Pages : 364
Book Description
'This book could not be more timely — published after a year that saw the costliest slew of weather disasters in history along with one of the deadliest pandemic, the emergence and spread of which is linked to climate change ... This book will be a valuable resource for scientists, policy makers but also educators and especially a young generation of readers who want to be informed citizens shaping the right choices for their local communities but also as cosmopolitan citizens of the world.'Journal of Indian Physics AssociationThe signs of global warming can be seen everywhere — hotter summers, frequent heavy rains, prolonged droughts, more severe forest fires, fiercer storms (including snow storms) and cyclones, as well as melting polar ice caps. Our indiscriminate actions are raising the spectre of millions of climate refugees who are victims of battles for water, crops, fish, and so on. It is poignant that the poorer countries, that are the least equipped to face these calamities have contributed the least to global warming, but are the worst hit.Only a concerted effort from the entire world by a rapid transition to renewable, clean and green energy sources, while checking wastage, deforestation and pollution, and a genuine adjustment in lifestyles towards moderation can avert the Earth, the only habitable planet we know, from turning into a hothouse.
Renewable Energy and Climate Change
Author: Volker V. Quaschning
Publisher: John Wiley & Sons
ISBN: 9780470686713
Category : Technology & Engineering
Languages : en
Pages : 320
Book Description
This dazzling introductory textbook encompasses the full range of today's important renewable energy technologies. Solar thermal, photovoltaic, wind, hydro, biomass and geothermal energy receive balanced treatment with one exciting and informative chapter devoted to each. As well as a complete overview of these state-of-the-art technologies, the chapters provide: clear analysis on their development potentials; an evaluation of the economic aspects involved; concrete guidance for practical implementation; how to reduce your own energy waste. If we do not act now to stop climate change, the consequences will be catastrophic. The current world situation is demonstrated here with the aid of full-colour figures and photographs, data diagrams and simple calculations and results. A multiplicity of impressive examples from countries across the globe show international ‘alternative’ energy in action. With its easy-to-read approach, this is an essential textbook for students on renewable energy courses, also environment and sustainability courses. Planners, operators, financers and consultants will find this an excellent manual for planning and realizing climate protection. Furthermore, this book makes great background reading for energy workers, designers, politicians and journalists, and anyone who is interested in the topic of climate change. Looking for further study? Visit the complimentary website; it hosts many useful related internet sites: www.wiley.com/go/quaschning_renewable
Publisher: John Wiley & Sons
ISBN: 9780470686713
Category : Technology & Engineering
Languages : en
Pages : 320
Book Description
This dazzling introductory textbook encompasses the full range of today's important renewable energy technologies. Solar thermal, photovoltaic, wind, hydro, biomass and geothermal energy receive balanced treatment with one exciting and informative chapter devoted to each. As well as a complete overview of these state-of-the-art technologies, the chapters provide: clear analysis on their development potentials; an evaluation of the economic aspects involved; concrete guidance for practical implementation; how to reduce your own energy waste. If we do not act now to stop climate change, the consequences will be catastrophic. The current world situation is demonstrated here with the aid of full-colour figures and photographs, data diagrams and simple calculations and results. A multiplicity of impressive examples from countries across the globe show international ‘alternative’ energy in action. With its easy-to-read approach, this is an essential textbook for students on renewable energy courses, also environment and sustainability courses. Planners, operators, financers and consultants will find this an excellent manual for planning and realizing climate protection. Furthermore, this book makes great background reading for energy workers, designers, politicians and journalists, and anyone who is interested in the topic of climate change. Looking for further study? Visit the complimentary website; it hosts many useful related internet sites: www.wiley.com/go/quaschning_renewable
Energy Democracy
Author: Denise Fairchild
Publisher: Island Press
ISBN: 1610918517
Category : Science
Languages : en
Pages : 290
Book Description
The near-unanimous consensus among climate scientists is that the massive burning of gas, oil, and coal is having cataclysmic impacts on our atmosphere and climate. These climate and environmental impacts are particularly magnified and debilitating for low-income communities and communities of color. Energy democracy tenders a response and joins the environmental and climate movement with broader movements for social and economic change in this country and around the world. Energy Democracy brings together racial, cultural, and generational perspectives to show what an alternative, democratized energy future can look like. The book will inspire others to take up the struggle to build the energy democracy movement.
Publisher: Island Press
ISBN: 1610918517
Category : Science
Languages : en
Pages : 290
Book Description
The near-unanimous consensus among climate scientists is that the massive burning of gas, oil, and coal is having cataclysmic impacts on our atmosphere and climate. These climate and environmental impacts are particularly magnified and debilitating for low-income communities and communities of color. Energy democracy tenders a response and joins the environmental and climate movement with broader movements for social and economic change in this country and around the world. Energy Democracy brings together racial, cultural, and generational perspectives to show what an alternative, democratized energy future can look like. The book will inspire others to take up the struggle to build the energy democracy movement.