A concise resource to the best practices and problem-solving ideas for understanding the airline network planning and scheduling process Airline Network Planning and Scheduling offers a comprehensive resource that is filled with the industry's best practices that can help to inform decision-modeling and the problem-solving process. Written by two industry experts, the book is designed to be an accessible guide that contains information for addressing complex challenges, problems, and approaches that arise on the job. The chapters begin by addressing the complex topics at a broad, conceptual level before moving on to more detailed modeling in later chapters. This approach follows the standard airline planning process and reflects the duties of the day-to-day job of network/schedule planners. To help gain a practical understanding of the information presented, each chapter includes exercises and data based on real-world case studies. In addition, throughout the book there are graphs and illustrations as well as, information on the most recent advances in airline network and planning research. This important resource: Takes a practical approach when detailing airline network planning and scheduling practices as opposed to a theoretical perspective Puts the focus on the complexity and main challenges as well as current practices and approaches to problem-solving and decision-making Presents the information in a logical sequence that begins with broad, conceptual topics and gradually delves into more advanced topics that address modeling Contains international standard airline planning processes, the day-to-day responsibilities of the job, and outlines the steps taken when building an airline network and schedule Includes numerous case studies, exercises, graphs, and illustrations throughout Written for professionals and academics, Airline Network Planning and Scheduling offers a resource for understanding best practices and models as well as the challenges involved with network planning and scheduling.

HAZOP: Guide to Best Practice, 3rd Edition describes and illustrates the HAZOP study method, highlighting a variety of proven uses and approaches. This updated edition brings additional experience with which to assist the reader in delivering optimum safety and efficiency of performance of the HAZOP team. HAZOP is the most widely-used technique in the process industries for the identification of hazards and the planning of safety measures. This book explains how to implement HAZOP techniques in new facilities and apply it to existing facilities. The content covers many of the possible applications of HAZOP and takes you through all the stages of a study. This simple, easily digestible book is a favorite in the chemical and process industries.

Magnetic Components for Power Electronics concerns the important considerations necessary in the choice of the optimum magnetic component for power electronic applications. These include the topology of the converter circuit, the core material, shape, size and others such as cost and potential component suppliers. These are all important for the design engineer due to the emergence of new materials, changes in supplier management and the examples of several component choices. Suppliers using this volume will also understand the needs of designers. Highlights include: Emphasis on recently introduced new ferrite materials, such as those operating at megahertz frequencies and under higher DC drive conditions; Discussion of amorphous and nanocrystalline metal materials; New technologies such as resonance converters, power factors correction (PFC) and soft switching; Catalog information from over 40 magnetic component suppliers; Examples of methods of component choice for ferrites, amorphous nanocrystalline materials; Information on suppliers management changes such as those occurring at Siemens, Philips, Thomson and Allied-Signal; Attention to the increasingly important concerns about EMI. This book should be especially helpful for power electronic circuit designers, technical executives, and material science engineers involved with power electronic components.

After decades "in the shadows," urban lighting is re-emerging as a matter of public debate. Long-standing truths are increasingly questioned as a confluence of developments affects lighting itself and the way it is viewed. Light has become an integral element of place-making and energy-saving initiatives alike. Rapidly evolving lighting technologies are opening up new possibilities, but also posing new challenges to planners. And awareness is growing that artificial illumination is not purely benign but can actually constitute a form of pollution. As a result, public policy frameworks, incentives and initiatives are undergoing a phase of innovation and change that will affect how cities are lit for years to come.

The first comprehensive compilation of current scientific discussions on urban lighting and light pollution from a social science and humanities perspective, "Urban Lighting, Light Pollution and Society" contributes to an evolving international debate on an increasingly controversial topic. The contributions draw a rich panorama of the manifold discourses connected with artificial illumination in the past and present from early attempts to promote new lighting technologies in the late 19th and early 20th centuries to current debates on restricting its excessive usage in public space and the protection of darkness. By bringing together a cross-section of current findings and debates on urban lighting and light pollution from a wide variety of disciplines, it reflects that artificial lighting is multifaceted in its qualities, utilisation and interpretation.

Including case studies from the United States, Europe, and the UK, "Urban Lighting, Light Pollution and Society" is one of the first to take a serious assessment of light, pollution, and places and is a valuable resource for planners, policy makers and students in related subjects. "

A Guide for Owners and Managers. This book provides a blueprint for action for readers making decisions about how to improve the energy efficiency and performance of new or existing buildings. Suitable for both seasoned veterans and new managers, it takes an objective and orderly approach to what is often a complex, costly, and time-consuming process. The book presents fundamental principles illustrated with case studies. It thoroughly covers the topics in a concise, technically accurate way. The book is designed for architects, engineers, and construction managers.

After decades "in the shadows," urban lighting is re-emerging as a matter of public debate. Long-standing truths are increasingly questioned as a confluence of developments affects lighting itself and the way it is viewed. Light has become an integral element of place-making and energy-saving initiatives alike. Rapidly evolving lighting technologies are opening up new possibilities, but also posing new challenges to planners. And awareness is growing that artificial illumination is not purely benign but can actually constitute a form of pollution. As a result, public policy frameworks, incentives and initiatives are undergoing a phase of innovation and change that will affect how cities are lit for years to come.

The first comprehensive compilation of current scientific discussions on urban lighting and light pollution from a social science and humanities perspective, "Urban Lighting, Light Pollution and Society" contributes to an evolving international debate on an increasingly controversial topic. The contributions draw a rich panorama of the manifold discourses connected with artificial illumination in the past and present from early attempts to promote new lighting technologies in the late 19th and early 20th centuries to current debates on restricting its excessive usage in public space and the protection of darkness. By bringing together a cross-section of current findings and debates on urban lighting and light pollution from a wide variety of disciplines, it reflects that artificial lighting is multifaceted in its qualities, utilisation and interpretation.

Including case studies from the United States, Europe, and the UK, "Urban Lighting, Light Pollution and Society" is one of the first to take a serious assessment of light, pollution, and places and is a valuable resource for planners, policy makers and students in related subjects. "

China s rapid economic growth in the recent decades has produced an unprecedented energy vulnerability that could threaten the sustainability of its economic development, a linchpin to social stability and ultimately the regime legitimacy of the Chinese Communist Party (CCP) as well as the foundation for China's rising power aspirations. What is the Chinese perception of the energy security and challenges, how has the Chinese government responded to the challenges? What are the international implications of China s search for energy security?

This collection of contributions by leading scholars seeks answers to these extremely important questions. The book is divided into three parts. Part I presents an overview of China s sense of energy security and its strategic responses. Part II examines China s energy policy-making processes, the efforts to reform and reorganize the energy sector and reset policy priorities Part III focuses on the international implications of China s search for energy security.

This book consists of articles published in the Journal of Contemporary China."

Leading architectural firms are now using in-house design simulation to help make more sustainable design decisions. Taking advantage of these new tools requires understanding of what can be done with simulation, how to do it, and how to interpret the results. This software-agnostic book, which is intended for you to use as a professional architect, shows you how to reduce the energy use of all buildings using simulation for shading, daylighting, airflow, and energy modeling. Written by a practicing architect who specializes in design simulation, the book includes 30 case studies of net-zero buildings, as well as of projects with less lofty goals, to demonstrate how energy simulation has helped designers make early decisions. Within each case study, author Kjell Anderson mentions the software used, how the simulation was set up, and how the project team used the simulation to make design decisions. Chapters and case studies are written so that you learn general concepts without being tied to particular software. Each chapter builds on the theory from previous chapters, includes a summary of concept-level hand calculations (if applicable), and gives comprehensive explanations with graphic examples. Additional topics include simulation basics, comfort, climate analysis, a discussion on how simulation is integrated into some firms, and an overview of some popular design simulation software.

This book is for energy auditors or retrofitters, whether they work in the weatherization program or in the private arena, and is intended to help them prepare for several certifications. These include programs with BPI, RESNET-HERS, DOE/NREL, and AEE (Association of Energy Engineers). The material in this book contains industry procedures and techniques and is intended to be an educational resource. Topics covered include the house as a system, the auditor s tools, weatherization, sealants, insulation and barriers, retrofitting, heating and cooling, baseload, and new construction. A number of additional appendices are included to provide the reader with valuable information in the performance of a residential energy audit. "

In a world increasingly concerned about the impact of carbon dioxide and other greenhouse gases in the atmosphere on global climate, the A Carbon Primer for the Built Environment will provide an understanding of the science and the public policy and regulation intended to tackle climate change. It will spell out the essential information needed for navigating through the growing regulatory maze with confidence. The book will: Provide an explanation of climate change, why carbon has been targeted as the main culprit and how this will impact the working lives of architects Explain key concepts such as: carbon footprinting, contraction & convergence, concentration based targets, the Energy Performance of Buildings Directive, decarbonising supply and reducing energy demand as well as the relevance of relevant government targets and international agreements Suggest an overall framework for achieving the carbon reduction targets and the requirements that will place on building designers Outline requirements and common standards and codes - providing guidance on compliance mechanisms Suggest and examine likely models for future practice The book will be essential reading for anyone wanting to familiarise themselves with the new landscape of carbon reduction in the built environment, with a particular focus on building design. It will also provide an accessible reference volume for information on particular policies, terms and initiatives as well as key data and numbers that will assist initial carbon calculations.

Addressing a field which, until now, has not been sufficiently investigated, Essentials of Natural Gas Microturbines thoroughly examines several natural gas microturbine technologies suitable not only for distributed generation but also for the automotive industry. An invaluable resource for power systems, electrical, and computer science engineers as well as operations researchers, microturbine operators, policy makers, and other industry professionals, the book: Explains the importance of natural gas microturbines and their use in distributed energy resource (DER) systems Discusses the history, development, design, and operation of gas microturbines Introduces the Evolutionary Algorithm for pollutant emissions and fuel consumption minimization Analyzes the power electronics for grid connection of natural gas microturbines Includes actual power quality measurements-graphical representations and numerical data-from a real system Contains 39 color figures Readers benefit from the clarity and practicality of Essentials of Natural Gas Microturbines, ultimately learning new techniques to increase electrical load efficiency, keep the environment cleaner, and improve equipment exploitation based on mathematical results.

Energy demand reduction is fast becoming a business activity for all companies and organisations because it can increase profits regardless of the nature of their core activity. The International Energy Agency believes that industry could improve its energy efficiency and reduce carbon dioxide emissions by almost a third using the best available practices and technologies. This guide looks at the many ways available to energy managers to achieve or even exceed this level of performance, including: base-lining consumption planning a monitoring and verification strategy metering (including smart, wireless metering) energy supply management motors and drives compressed air and process controls. Uniquely, it includes a whole chapter on greening data centres. It also looks at topics covered in greater detail in its companion volume, Energy Management in Buildings: insulation, lighting, renewable heating, cooling and HVAC systems. Further chapters examine minimising water use and how to make the financial case, both to prioritise measures for cost effectiveness, and to get management on board. This title is aimed at all professional energy, industry and facilities managers, energy consultants, students, trainees and academics and can be read alongside training for ISO 50001 - Energy Management Systems. It takes the reader from basic concepts to the latest advanced thinking, with principles applicable anywhere in the world and in any climate.

In a world increasingly concerned about the impact of carbon dioxide and other greenhouse gases in the atmosphere on global climate, the A Carbon Primer for the Built Environment will provide an understanding of the science and the public policy and regulation intended to tackle climate change. It will spell out the essential information needed for navigating through the growing regulatory maze with confidence. The book will: Provide an explanation of climate change, why carbon has been targeted as the main culprit and how this will impact the working lives of architects Explain key concepts such as: carbon footprinting, contraction & convergence, concentration based targets, the Energy Performance of Buildings Directive, decarbonising supply and reducing energy demand as well as the relevance of relevant government targets and international agreements Suggest an overall framework for achieving the carbon reduction targets and the requirements that will place on building designers Outline requirements and common standards and codes - providing guidance on compliance mechanisms Suggest and examine likely models for future practice The book will be essential reading for anyone wanting to familiarise themselves with the new landscape of carbon reduction in the built environment, with a particular focus on building design. It will also provide an accessible reference volume for information on particular policies, terms and initiatives as well as key data and numbers that will assist initial carbon calculations.

The recently published book by the author, "Engineering Heat Transfer," already dealt with exact computation of heat exchangers and tube banks. In design c- putationthisisaccomplishedviacorrectivefactors;thelattermakesitpossibleto compute the actual mean temperature difference by starting from the logarithmic onerelativeto?uidsinparallel?oworcounter?ow. As far as veri?cation computation is concerned, corrective factors were int- ducedtocomputeacertaincharacteristicfactorcorrectly, asisfundamentalforthis typeofcomputation. Basedontheabove, theauthordecidedtoinvestigatefurther, re?ne, andwiden thistopic: theoutcomeofthisworkhasresultedinthishandbook. Newtypesofexchangerswereexamined;thecalculationwasre?nedtoproduce practicallyexactvaluesforthefactors. Thescopeoftheinvestigationwasincreased by widening the range of the starting factors. Furthermore, a greater number of valuestobeincludedinthetableswasconsidered. Finally, afewcharacteristicsof certainvaluesofthecorrectivefactorswerehighlighted. The?rstsectionisanintroduction;itsummarizesthefundamentalcriteriaofheat transferandproceedstoillustratethebehaviorof?uidsinbothparallelandcounter ?ow. Italsoshowshowtocomputethemeanisobaricspeci?cheatforsome?uids; itillustratesthesigni?canceofdesigncomputationandveri?cationcomputation. In addition, itillustrateshowtoproceedwithheatexchangersandtubebankstocarry outbothdesignandveri?cationcomputationcorrectly. AppendixAthenincludes36tablesasareferencefordesigncomputation, The tablescontainthecorrectivefactorsrequiredtoobtaintheactualmeantemperature differencebystartingfromthemeanlogarithmictemperaturedifferencerelativeto ?uidsinparallel?oworcounter?ow. Finally, Appendix B includes 35 tables for veri?cation computation. As far as heatexchangers areconcerned, itshowsthevaluesoffactor ? whichisrequired forthistypeofcomputation. Thevaluesofthecorrectivefactorsforcoilsandtube banksarealsopresented. Milano, Italy DonatelloAnnaratone v Notation c=speci?cheat(J/kgK) d=diameter(m) E=ef?ciencyfactor h=enthalpy(kJ/kg) k=thermalconductivity(W/mK) M=mass?owrate(kg/s) m=massmoisturepercentage(%) q=heatpertimeunit(W) 2 S=surface(m ) ? t=temperature( C) 2 U=overallheattransfercoef?cient(W/m K) x=thickness(m) 2 ? =heattransfercoef?cient(W/m K) ? =characteristicfactor ? =characteristicfactor ? =ef?ciency ? =correctivefactor ? =correctivefactor ? =characteristicfactor ? ?t=temperaturedifference( C) vii viii Notation Superscripts =heating?uid =heated?uid Subscripts c=counter?ow e=exchanger i=inside l=logarithmic m=mean o=outside p=constantpressure(isobaric), parallel?ow w=wall 1=inlet(forheatingorheated?uid) 2=outlet(forheatingorheated?uid) Contents 1 Introduction to Computation . . . . . . . . . . . . . . . . . . . . . 1 1. 1 GeneralConsiderations . . . . . . . . . . . . . . . . . . . . . . 1 1. 2 MeanIsobaricSpeci?cHeat . . . . . . . . . . . . . . . . . . . . 3 1. 2. 1 WaterandSuperheatedSteam . . . . . . . . . . . . . . . 4 1. 2. 2 AirandOtherGases. . . . . . . . . . . . . . . . . . . . 4 2 Design Computation. . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. 2 FluidsinParallelFloworinCounterFlow . . . . . . . . . . . . 8 2. 3 TheMeanDifferenceinTemperatureinReality . . . . . . . . . 12 2. 3. 1 FluidsinCrossFlow. . . . . . . . . . . . . . . . . . . . 14 2. 3. 2 HeatExchangers. . . . . . . . . . . . . . . . . . . . . . 15 2. 3. 3 Coils. . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. 3. 4 TubeBankswithVariousPassagesoftheExternalFluid . 21

One major goal of the World Materials Research Institute Forum - WMRIF is to promote young scientists in the field of materials science and engineering. To enhance the international knowledge exchange between young postdoctoral scientists all over the world, WMRIF meanwhile regularly organizes joint workshops among the member institutes. These workshops also represent an increasingly appreciated platform to get known to each other and to build co-operations. For such workshops, various topics are selected, pointing to future perspectives and challenges in the field of Materials Science and Engineering.

This time, the presentations of the workshop focused on the four subjects

Challenges in conclusive, realistic and system oriented materials testing

Materials challenges for water supply

Materials challenges in the extraction and recovery of scarce elements and minerals

Materials challenges for nuclear fission and fusion.

This book comprises the peer-reviewed contributions during the 2nd International Workshop for Young Materials Scientists at BAM Federal Institute for Materials Research and Testing, Berlin, Germany. It also provides a very informative overview of recent results for all materials scientists.

The landscape for implementing energy efficient projects is rapidly changing and the need for energy project financing has never been greater. This book provides the key success factors for structuring a finance energy project and getting it approved by top management. Part I covers the need for financing as well as the basic concepts. Part II covers some practical applications of financing such as performance contracts, power purchase agreements and other items like PACE financing. Part III contains articles that have helped many engineers get more projects implemented as they include information that can be used to present projects and get them approved.

This book provides a succinct overview of the evolution of policies addressing energy and climate justice in South Africa. Drawing on a range of analytical perspectives, including socio-technical studies, just transitions, and critical political economy, it explains why South Africa's energy transition from a coal-dependent, centralised power generation and distribution system has been so slow, and reveals the types of socio-political inequalities that persist across regimes and energy sources. Topics explored include critical approaches to the South African state and its state-owned energy provider, Eskom; the political ecologies of coal and water; the politics of non-renewable energy alternatives; as well as the trajectory and fate of the Renewable Energy Independent Power Producers Procurement Programme (REIPPPP), the country's major renewable energy policy. The book concludes with reflections on alternative, neglected energy and development paths, suggesting how the political economy of South Africa's energy system could be further transformed for the better.

An authoritative and comprehensive guide to managing energy conservation in infrastructures Energy Conservation in Residential, Commercial, and Industrial Facilities offers an essential guide to the business models and engineering design frameworks for the implementation of energy conservation in infrastructures. The presented models of both physical and technological systems can be applied to a wide range of structures such as homes, hotels, public facilities, industrial facilities, transportation, and water/energy supply systems. The authors--noted experts in the field--explore the key performance indicators that are used to evaluate energy conservation strategies and the energy supply scenarios as part of the design and operation of energy systems in infrastructures. The text is based on a systems approach that demonstrates the effective management of building energy knowledge and supports the simulation, evaluation, and optimization of several building energy conservation scenarios. In addition, the authors explore new methods of developing energy semantic network (ESN) superstructures, energy conservation optimization techniques, and risk-based life cycle assessments. This important text: Defines the most effective ways to model the infrastructure of physical and technological systems Includes information on the most widely used techniques in the validation and calibration of building energy simulation Offers a discussion of the sources, quantification, and reduction of uncertainty Presents a number of efficient energy conservation strategies in infrastructure systems, including HVAC, lighting, appliances, transportation, and industrial facilities Describes illustrative case studies to demonstrate the proposed energy conservation framework, practices, methods, engineering designs, control, and technologies Written for students studying energy conservation as well as engineers designing the next generation of buildings, Energy Conservation in Residential, Commercial, and Industrial Facilities offers a wide-ranging guide to the effective management of energy conservation in infrastructures.

Since the German edition of this book, the topic of risk has experienced even greater attention, not only in the world of science but also in other fields, such as economics and politics. Therefore, many new publications have evolved. To keep with the idea of an encyclopedia for the topic of risk, this book has been completely reworked. Not only are many updated examples included in chapter "Risks and disasters" but also new chapters have been introduced, such as the chapter "Indetermination and risk." This new chapter was developed since the question "Is it possible for risks to be completely eliminated, and if not why?" has become a major point of c- cern. Therefore, especially in this chapter, the focus of the book has - tended from a simple mathematical or engineering point of view to include much broader concepts. Here, not only aspects of system theory have to be considered, but also some general philosophical questions start to inf- ence the considerations of the topic of risk. The main goal of this edition, however, is not only the extension and revision of the book, but also the translation into the English language to allow more readers access to the ideas of the book. The author deeply hopes that the success the book made in the German edition continues and that readers experience a major gain from reading the book.

Explanatory text that treats the complete fundamentals of energy and current energy resources, technologies developments, solutions to energy issues and new concepts ranging from fossil fuel to solar energy, biomass energy, wind energy, ocean energy, geothermal energy, hydrogen energy, fuel cells, thermo-electric systems, nuclear energy and nanotechnology concepts to generate clean energy. The theoretical aspects of various energy conversion technologies, and design practices in light of national and international perspectives are discussed with educational examples. Every technique is explained in detail and every chapter is concluded with a reference section, recommended reading and a number of questions. Intended for university students with various backgrounds, who are involved in energy science and engineering (chemistry, physics, environmental sciences, earth sciences, petroleum, mining and mechanical engineering). Recommended for professionals seeking an introduction to the subject.

Engineering Separations Unit Operations for Nuclear Processing provides insight into the fundamentals of separations in nuclear materials processing not covered in typical texts. This book integrates fuel cycle and waste processing into a single, coherent approach, demonstrating that the principles from one field can and should be applied to the other. It provides historical perspectives on nuclear materials processing, current assessment and challenges, and how past challenges were overcome. It also provides understanding of the engineering principles associated with handling nuclear materials. This book is aimed at researchers, graduate students, and professionals in the fields of chemical engineering, mechanical engineering, nuclear engineering, and materials engineering.

Completely revised and updated, this ninth edition of a bestseller covers both management and technical strategies which can be used to slash energy costs by as much as 40% in industrial facilities. It covers cogeneration, gas distributed generation technologies, steam system optimization, geothermal heat pumps, energy outsourcing, electricity purchasing strategies, and power quality case studies. It supplies ready-to-apply guidelines for life cycle costing, electrical system optimization, lighting and HVAC system efficiency improvement, mechanical and process system performance, building energy loss reduction, financing energy projects, and more.

Computational Intelligence for Engineering Systems provides an overview and original analysis of new developments and advances in several areas of computational intelligence. Computational Intelligence have become the road-map for engineers to develop and analyze novel techniques to solve problems in basic sciences (such as physics, chemistry and biology) and engineering, environmental, life and social sciences. The contributions are written by international experts, who provide up-to-date aspects of the topics discussed and present recent, original insights into their own experience in these fields. The authors also include methods that apply to diverse fields such as manufacturing, tourism, power systems, computer science, robotics, chemistry, and biology.

Topics include: Simulation and evolution of real and artificial life forms; Self-organization; Models of communication and social behaviors; Emergent collective behaviors and swarm intelligence; Adaptive, complex and biologically inspired systems; Power Systems; Web-based Applications; Knowledge discovery; Intelligent Tutoring Systems; Decision support Systems; Intelligent Tutoring Systems.

This book traces the interacting histories of the disciplines of ecology and economics, from their common origin in the ancient Greek concept of oikonomia, through their distinct encounters with energy physics, to the current obstruction of neoliberal economics to responses to the ecological and climate crisis of the so-called Anthropocene. Reconstructing their constitution as separate sciences in the era of fossil-fuelled industrial capitalism, the book offers an explanation of how the ecological sciences have moved from a position of critical collision with mainstream economics in the 1970s, to one of collusion with the project of permanent growth, in and through the thermal crisis of the biosphere.

The climate of our planet is changing at a rate unprecedented in recent human history. The energy absorbed from the sun exceeds what is returned to space. The planet as a whole is gaining energy. The heat content of the ocean is increasing, the surface and atmosphere are warming, mid-latitude glaciers are melting, sea level is rising, and the Arctic Ocean is losing its ice cover. None of these assertions is based on theory but on hard observational facts. Given the science-heavy nature of climate change, debates and discussions have not played as big a role in the public sphere as they should, and instead are relegated to often misinformed political discussions and inaccessible scientific conferences. Michael B. McElroy, an eminent Harvard scholar of environmental studies, combines both his research chops and pedagogical expertise to present a book that will appeal to the lay reader but still be grounded in scientific fact. The book begins with a general introduction, followed by chapters on energy basics, a discussion of the contemporary energy systems of the US and China, and the aforementioned chapters on climate. It continues with a series of chapters on specific energy options: coal, oil, natural gas, nuclear, wind, solar, hydro, geothermal, and biomass. The perspective is global but with a specific focus on the US and China recognizing the critical role these countries must play in addressing the challenge of global climate change. The book concludes with a discussion of initiatives now underway to at least reduce the rate of increase of greenhouse gas emissions, together with a vision for a low carbon energy future that could in principle minimize the long-term impact of energy systems on global climate.