The past few decades have witnessed remarkable growth in the application of passive seismic monitoring to address a range of problems in geoscience and engineering, from large-scale tectonic studies to environmental investigations. Passive seismic methods are increasingly being used for surveillance of massive, multi-stage hydraulic fracturing and development of enhanced geothermal systems. The theoretical framework and techniques used in this emerging area draw on various established fields, such as earthquake seismology, exploration geophysics and rock mechanics. Based on university and industry courses developed by the author, this book reviews all the relevant research and technology to provide an introduction to the principles and applications of passive seismic monitoring. It integrates up-to-date case studies and interactive online exercises, making it a comprehensive and accessible resource for advanced students and researchers in geophysics and engineering, as well as industry practitioners.

After the perceived failure of global approaches to tackling climate change, enthusiasm for local climate initiatives has blossomed world-wide, suggesting a more experimental approach to climate governance. Innovating Climate Governance: Moving Beyond Experiments looks critically at climate governance experimentation, focusing on how experimental outcomes become embedded in practices, rules and norms. Policy which encourages local action on climate change, rather than global burden-sharing, suggests a radically different approach to tackling climate issues. This book reflects on what climate governance experiments achieve, as well as what happens after and beyond these experiments. A bottom-up, polycentric approach is analyzed, exploring the outcomes of climate experiments and how they can have broader, transformative effects in society. Contributions offer a wide range of approaches and cover more than fifty empirical cases internationally, making this an ideal resource for academics and practitioners involved in studying, developing and evaluating climate governance.

This book is the outcome of the conference "Global Environmental Change: Challenges to Science and Society in Southeastern Europe" organized by the Scienti c Coordination Center for Global Change (SCCGC) at the Bulgarian Academy of Sciences jointly with the Austrian Science and Research Liaison Of cesLjubljanaandSo a(ASO).TheeventwassupportedbytheFederalMinistry ofScienceandResearchoftheRepublicofAustriaintheframeworkofitsSEEs- encecooperationinitiative.SponsorshipwasalsoprovidedfromtheKnight-Staneva Foundation for Sustainability and Future Environments (USA) and the EC FP6 ADAGIOproject(www.adagio-eu.org). The Conference celebrated the anniversary of the founding of the SCCGC in 1997asNationalCoordinationCenterforGlobalChange(NCCGC).Theideafor suchacenterevolvedattheJune1997Workshop"GlobalChangeandBulgaria" heldintheAmericanUniversityinBulgaria, Blagoevgrad, sponsoredbytheUS National Science Foundation via the Center for Integrated Regional Assessment (CIRA) at the Pennsylvania State University. In examining the competencies Bulgarian scientists would bring to the study of climate change and its impacts, thatworkshopidenti edanumberofresearchprioritiesandfuturestrategiestobe pursued. The workshop resulted in two publications, Globalnite promeni i 1 2 B lgari andGlobalChangeandBulgaria. Themostimportantfuturestrategyfromthe1997Workshopwastheproposalto theleadershipoftheBulgarianAcademyofSciencesforformationoftheNCCGC, withtherecommendationthatitbeheadedbyAcademicianDimitarMishev, dir- toroftheAcademy'sSolar-TerrestrialIn uencesLaboratory, andmembershipfrom avarietyofinstitutesandotherorganizations.InJuly1997, theNCCGCcameinto being and operated under that title until the death of its president, Academician Mishev, in2003. 1 1999.So a: NationalCoordinationCenterforGlobalChange, BulgarianAcademyofSciences, 370 pp. (Todor Hristov, C. Gregory Knight, Dimitar Mishev, Marieta P. Staneva, editors; in Bulgarian).ISBN954-90485-1-9. 2 2000.So a: NationalCoordinationCenterforGlobalChange, BulgarianAcademyofSciences, 350]viiipp.(MarietaP.Staneva, C.GregoryKnight, TodorN.Hristov, DimitarMishev, editors). ISBN954-90485-2-7. v vi Preface Duringthatinterim, oneoftheresearchprioritieswasinitiated, namelyastudy ofthe1982-1994Bulgariandroughtasananalogoffutureclimatechange, realized asaprojectcoordinatedinBulgariabyProfessorIvanRaevoftheForestResearch InstituteandintheUSbyC.GregoryKnightofthePennsylvaniaStateUniversity, withfundingfromtheUSNationalScienceFoundationviaCIRA.Thatprojectalso resultedintwobooks, Zasuxavaneto v B lgari: s vremenen analog za 3 klimatiqni promeni and Drought in Bulgaria: A Contemporary Analog of 4 ClimateChange. The NCCGC played an important role in the creation of the Industrial TransformationSciencePlanoftheInternationalHumanDimensionsProgramme in1998-1999.TheCentrealsoco-sponsoredaworkshoponIntegratedRegional Assessment of Climate Change held in Budapest in 1999 and hosted the So a workshoponHumanDimensionsofGlobalChangein2000.

Following the success of the first edition, this fully updated and revised book continues to provide an interdisciplinary introduction to sustainability issues in the context of chemistry and chemical technology. Its prime objective is to equip young chemists (and others) to more fully to appreciate, defend and promote the role that chemistry and its practitioners play in moving towards a society better able to control, manage and ameliorate its impact on the ecosphere. To do this, it is necessary to set the ideas, concepts, achievements and challenges of chemistry and its application in the context of its environmental impact, past, present and future, and of the changes needed to bring about a more sustainable yet equitable world. Progress since 2010 is reflected by the inclusion of the latest research and thinking, selected and discussed to put the advances concisely in a much wider setting - historic, scientific, technological, intellectual and societal. The treatment also examines the complexities and additional challenges arising from public and media attitudes to science and technology and associated controversies and from the difficulties in reconciling environmental protection and global development. While the book stresses the central importance of rigour in the collection and treatment of evidence and reason in decision-making, to ensure that it meets the needs of an extensive community of students, it is broad in scope, rather than deep. It is, therefore, appropriate for a wide audience, including all practising scientists and technologists.

In recent decades, science has experienced a revolutionary shift. The development and extensive application of computer modelling and simulation has transformed the knowledge-making practices of scientific fields as diverse as astro-physics, genetics, robotics and demography. This epistemic transformation has brought with it a simultaneous heightening of political relevance and a renewal of international policy agendas, raising crucial questions about the nature and application of simulation knowledges throughout public policy. Through a diverse range of case studies, spanning over a century of theoretical and practical developments in the atmospheric and environmental sciences, this book argues that computer modelling and simulation have substantially changed scientific and cultural practices and shaped the emergence of novel 'cultures of prediction'. Making an innovative, interdisciplinary contribution to understanding the impact of computer modelling on research practice, institutional configurations and broader cultures, this volume will be essential reading for anyone interested in the past, present and future of climate change and the environmental sciences.

There are many current socio-environmental conflicts and problems around the world that affect distinct nationalities, races, or ethnicities. Part of the solution to these issues involves interdisciplinary scholarship to make sense of the communication challenges that are involved. However, current research in this area has lacked clear focus on the ways in which environmental issues are culturally and socially constructed by racial and ethnic minorities. This volume aims to improve our understanding of culturally bounded rationalities across racial and ethnic groups facing environmental challenges, as they relate to the formation of environmental identities, environmental injustice, political activism, public engagement, and media representations, among others. The ideas presented in this book dovetail with the idea that environmental communication scholars and practitioners can effectively intervene to engage ethnic groups that traditionally are not included in decision making or deliberation processes that directly affect their livelihoods. Considering problems such as the siting of industrial facilities, flooding, droughts, climate change, and air and water pollution, this book will be of great interest to students, scholars, and practitioners of environmental communication.

Environmental Data Analysis with MatLab is a new edition that expands fundamentally on the original with an expanded tutorial approach, new crib sheets, and problem sets providing a clear learning path for students and researchers working to analyze real data sets in the environmental sciences. Since publication of the bestselling Environmental Data Analysis with MATLAB (R), many advances have been made in environmental data analysis. One only has to consider the global warming debate to realize how critically important it is to be able to derive clear conclusions from often noisy data drawn from a broad range of sources. The work teaches the basics of the underlying theory of data analysis and then reinforces that knowledge with carefully chosen, realistic scenarios. MATLAB (R), a commercial data processing environment, is used in these scenarios. Significant content is devoted to teaching how it can be effectively used in an environmental data analysis setting. This new edition, though written in a self-contained way, is supplemented with data and MATLAB (R) scripts that can be used as a data analysis tutorial. New features include boxed crib sheets to help identify major results and important formulas and give brief advice on how and when they should be used. Numerical derivatives and integrals are derived and illustrated. Includes log-log plots with further examples of their use. Discusses new datasets on precipitation and stream flow. Topical enhancement applies the chi-squared test to the results of the generalized least squares method. New coverage of cluster analysis and approximation techniques that are widely applied in data analysis, including Taylor Series and low-order polynomial approximations; non-linear least-squares with Newton's method; and pre-calculation and updating techniques applicable to real time data acquisition.

Climate change mechanisms, impacts, risks, mitigation, adaption, and governance are widely recognized as the biggest, most interconnected problem facing humanity. Big Data Mining for Climate Change addresses one of the fundamental issues facing scientists of climate or the environment: how to manage the vast amount of information available and analyse it. The resulting integrated and interdisciplinary big data mining approaches are emerging, partially with the help of the United Nation's big data climate challenge, some of which are recommended widely as new approaches for climate change research. Big Data Mining for Climate Change delivers a rich understanding of climate-related big data techniques and highlights how to navigate huge amount of climate data and resources available using big data applications. It guides future directions and will boom big-data-driven researches on modeling, diagnosing and predicting climate change and mitigating related impacts. This book mainly focuses on climate network models, deep learning techniques for climate dynamics, automated feature extraction of climate variability, and sparsification of big climate data. It also includes a revelatory exploration of big-data-driven low-carbon economy and management. Its content provides cutting-edge knowledge for scientists and advanced students studying climate change from various disciplines, including atmospheric, oceanic and environmental sciences; geography, ecology, energy, economics, management, engineering, and public policy.

With unique scholarly analysis and practical discussion, this book provides a comprehensive introduction to the relationship between environmental protection and human rights being formalized into law in many legal systems. By illuminating human rights theory and the institutions that can be employed to meet environmental goals, this book instructs on environmental techniques and procedures that assist in the protection of human rights. The text provides cogent guidance on a growing international jurisprudence on the promotion and protection of human rights in relation to the environment that has been developed by international and regional human rights bodies and tribunals. It explores a rich body of case law that continues to develop within states on the environmental dimension of the rights to life, to health, and to public participation and access to information. Five compelling contemporary case studies are included that implicate human rights and the environment, ranging from large dam projects, to the creation of a new human rights, to a clean environment.

This authoritative volume reviews the environmental chemistry and toxicological effects of a marine pollutant of exceptional potency, tributyltin (TBT), and outlines the international response to control TBT. TBT compounds have been widely utilized in marine anti-fouling paint formulations to obtain increased fuel efficiencies and long lifetimes for maritime vessels and structures. However, its extreme toxicity has resulted in numerous adverse biological effects, and its persistence ensures that such problems are likely to continue. A wide variety of disciplines are brought together to illustrate the general principles, pathways and problems involved in identifying and quantifying an environmental toxin, elucidating deleterious biological consequences, and the legal framework that can invoke mitigation via regulation. This text not only has wide appeal for undergraduate courses in environmental science, chemistry and marine ecology, but also forms a valuable sourcebook for environmental planners and serves as a 'successful' case study for undergraduate courses in environmental law, planning and science.

The pKa of a compound describes its acidity or basicity and, therefore, is one of its most important properties. Its value determines what form of the compound-positive ion, negative ion, or neutral species-will be present under different circumstances. This is crucial to the action and detection of the compound as a drug, pollutant, or other active chemical agent. In many cases it is desirable to predict pKa values prior to synthesizing a compound, and enough is now known about the salient features that influence a molecule's acidity to make these predictions. Computational Approaches for the Prediction of pKa Values describes the insights that have been gained on the intrinsic and extrinsic features that influence a molecule's acidity and discusses the computational methods developed to estimate acidity from a compound's molecular structure. The authors examine the strengths and weaknesses of the theoretical techniques and show how they have been used to obtain information about the acidities of different classes of chemical compounds. The book presents theoretical methods for both general and more specific applications, covering methods for various acids in aqueous solutions-including oxyacids and related compounds, nitrogen acids, inorganic acids, and excited-state acids-as well as acids in nonaqueous solvents. It also considers temperature effects, isotope effects, and other important factors that influence pKa. This book provides a resource for predicting pKa values and understanding the bases for these determinations, which can be helpful in designing better chemicals for future uses.

The threat of biological and chemical terrorism has driven the demand for timely techniques that can quickly detect the agent or agents used in an attack. The detection and/or prevention of these potential security threats provide significant scientific and technical challenges due to the combination of possible agents and modes of delivery available. This book will present a thorough look at the importance and technological challenges of mass spectrometry (MS) for the detection & identification of biological and chemical threats. This new contribution's general aims are to draw the attention of recognized practitioners, experts and graduate students trying to grasp the latest MS developments in the cutting-edge fields of MS-biodefense technologies for the rapid/early/specific sensitive threat detection of pathogens, viruses, explosives, mycotoxins, chemical agents, and biological markers of xenobiotic chemicals.

Groundwater constitutes the most important reservoir of available clean water. Due to its overexploitation, some anthropogenic mismanagement on the surface and the overloading of the cleanup potential of subsurface, many of the groundwater systems used for water supply are in jeopardy. The problem is very severe in dry-lands, but also in urban, industrial, agricultural and traffic areas.

This book first addresses the recharge fluxes relating both to the quantity and quality of groundwater. In order to face the threats to the water supply and to be able to maintain a sustainable water management policy, detailed knowledge is needed on the surface-to-subsurface transformation link in the water cycle. Secondly, a comparison of both the traditional and modern approaches to determine groundwater recharge is presented. The traditional approach to determine groundwater recharge is based on water balance estimates and hydraulic considerations, which yield instantaneous values at best but do not integrate the totality of recharge pathways in time and space. In contrast, environmental tracers integrate these factors. Finally, the fate of groundwater recharge in the subsurface by hydraulic and geologic means is explained in detail, in order to stimulate adapted groundwater-management strategies and to better assess consequences of climate changes on groundwater resources as a whole.

Eco-efficiency has long been a concept: the intention of reducing environmental impact while increasing environmental value. Its origins are with the World Business Council for Sustainable Development. However, in a globalized world with sustained economic growth environmental degradation is threatening. Macro level requirements on sustainability should be reflected in the eco-efficiency of choices at a micro level, like on technologies, supply chains and product systems. Eco-efficiency analysis has come to fruition as a fully quantified method for analysis, linking to specific domains of economic modelling, specific environmental models, and several methods for integrating these two domains into eco-efficiency scores. This eco-efficiency analysis can guide choices in policy, business, and consumptions activities, all from a single common background.

A central asset of eco-efficiency analysis is that it does not depend on a specific evaluation of environmental impacts against economic effects, avoiding the often disputed results of neo-classical evaluation methods. For integrating the different environmental scores several evaluation methods may be used including those based on willingness-to-pay, panel procedures, and public statements on policy goals. Each may have advantages, but in line with the normative neutrality strived for in eco-efficiency, these preference and value choices may be avoided to some extent. This can be done either by taking a common denominator or by having less demanding objectives, for instance focusing on efficiency of measures only.

A substantial Japanese paper on Maximum Abatement Cost method and a paper on revealed public preferences in The Netherlands comprise the first section on methods. Next, there are four sections on domains of application of eco-efficiency analysis. In the Agriculture section, a case on conservation agriculture in China is worked out, using input-output analysis. In the Industry section, cases range from supply chain management to waste water management and methods to speed up innovation. In the Products & Consumption section, cases refer to overall household performance, specific energy products and methods for upgradeable product design. Finally, in the Recycling section, cases relate to increasing the supply of secondary materials and to increasing secondary materials use.

This book is about the legal, economical, and practical assessment and management of risky activities arising from routine, catastrophic environmental and occupational exposures to hazardous agents. It includes a discussion of aspects of US and European Union law concerning risky activities, and then develops the economic analyses that are relevant to implementing choices within a supply and demand framework. The book also discusses exposure-response and time-series models used in assessing air and water pollution, as well as probabilistic cancer models, including toxicological compartmental, pharmaco-kinetic models and epidemiological relative risks and odds ratios-based models. Statistical methods to measure agreement, correlation and discordance are also developed. The methods and criteria of decision-analysis, including several measures of value of information (VOI) conclude the expositions. This book is an excellent text for students studying risk assessment and management.

This book provides concise, up-to-date and easy-to-follow information on certain aspects of an ever important research area: multiphase flow in porous media. This flow type is of great significance in many petroleum and environmental engineering problems, such as in secondary and tertiary oil recovery, subsurface remediation and CO2 sequestration. This book contains a collection of selected papers (all refereed) from a number of well-known experts on multiphase flow. The papers describe both recent and state-of-the-art modeling and experimental techniques for study of multiphase flow phenomena in porous media. Specifically, the book analyses three advanced topics: upscaling, pore-scale modeling, and dynamic effects in multiphase flow in porous media.

This will be an invaluable reference for the development of new theories and computer-based modeling techniques for solving realistic multiphase flow problems. Part of this book has already been published in a journal.

Audience

This book will be of interest to academics, researchers and consultants working in the area of flow in porous media.

Is development passe? Is it merely a by-product or a trickle down effect of economic growth, spurred by globalisation? Will poverty simply diminish with increased global markets? This state-of-the-art critical development reader deals with these and related questions. Globalisation, Poverty and Conflict examines the inter-relationships between globalisation, poverty and conflict. It complements current debates in the field of development studies and, in an era in which development fatigue seems to have become more profound than ever before, it brings the importance of development once again to the forefront. Achieving the Millennium Development Goals by 2015 is a concrete target which many governments have agreed to work towards.Whether these goals can be realised is another issue. Nonetheless, the Millennium Development Goals have brought more focused attention to development in the past few years and renewed debate about the relationships between the process of globalisation and widespread poverty and the emergence of violent conflicts.

The authors in this edited volume discuss these inter-related and highly controversial topical elements of development in a number of chapters organised around three sets of issues: (1) globalisation, inequality and poverty; (2) governance, civil society and poverty; and (3) resource degradation, institutions and conflict. The contributions represent current thinking on (and practice of) development policy, poverty reduction, the need for multi-level democratic institutions, and the containing and prevention of conflicts. The authors confront the predominant mainstream ideas on development and propose alternatives.

The chapters, written by a select group of scholars and development practitioners, will be of direct interest to those involved in this field of social sciences and in development practice, but they are composed in such a way as to remain accessible for the generally interested reader. "

Large lakes are important because of their size and ecological distinctiveness as well as their economic and cultural value. Optimal management of them requires a proper understanding of anthropogenic impacts both on the lake ecosystems as such and on the services they provide for society. The specific structural and functional properties of large lakes, e.g. morphology, hydrography, biogeochemical cycles and food-web structure, are all directly related to their size. Although large lakes are among the best-studied ecosystems in the world, the application to them of environmental regulations such as the European Water Framework Directive is a challenging task and requires that several natural and management aspects specific to these water bodies are adequately considered. These vulnerable ecosystems often suffer from accelerated eutrophication, over-fishing, toxic contamination and invasive species. Large lakes offer socio-economic benefits and can be used in many ways, and are often areas in which economic, cultural and political interests overlap. In this book the problems regarding the present status of European large lakes and the directions of change are discussed. Threats caused by direct human impact and by climate change, protection needs and restoration measures are considered.

Mathematical modelling is an essential tool in present-day ecological research. Yet for many ecologists it is still problematic to apply modelling in their research. In our experience, the major problem is at the conceptual level: proper understanding of what a model is, how ecological relations can be translated consistently into mathematical equations, how models are solved, steady states calculated and interpreted. Many textbooks jump over these conceptual hurdles to dive into detailed formulations or the mathematics of solution. This book attempts to fill that gap. It introduces essential concepts for mathematical modelling, explains the mathematics behind the methods, and helps readers to implement models and obtain hands-on experience. Throughout the book, emphasis is laid on how to translate ecological questions into interpretable models in a practical way.

The book aims to be an introductory textbook at the undergraduate-graduate level, but will also be useful to seduce experienced ecologists into the world of modelling. The range of ecological models treated is wide, from Lotka-Volterra type of principle-seeking models to environmental or ecosystem models, and including matrix models, lattice models and sequential decision models. All chapters contain a concise introduction into the theory, worked-out examples and exercises. All examples are implemented in the open-source package R, thus taking away problems of software availability for use of the book. All code used in the book is available on a dedicated website.

This is the story of tropical agricultural science and agricultural development in the 20th century, focusing on the African farmer and African farming methods. It describes successes as well as fads and failures, many based on the author 's first-hand observations during more than 40 years in tropical agronomy-related fields. Moving into the 21st century, the book explores the rise of computer modeling of crops and crop production.

Increasing numbers of ecologists and conservation biologists have begun to explore the use of drone technology to obtain accurate and up-to-date data on the distribution and density of species, as well as the threats to their habitats, in their ongoing attempts to conserve and monitor biodiversity. Conservation drones are low-cost, autonomous, and operator-friendly unmanned aerial vehicles that can be used for surveying, mapping, and monitoring both habitat and biodiversity. They are fast becoming a valuable complement to ground-based surveys and satellite imagery for a wide range of ecological and conservation applications. The authors pioneered the use of conservation drones for the purpose of monitoring orangutan populations in Southeast Asia. They subsequently founded ConservationDrones.org to share their knowledge of building and using drones with colleagues in the wider environmental community. This website has proved highly popular and this book aims to further build capacity to use drones and inspire others to adapt emerging technologies for practical conservation.

More than 30-year operational satellite data have already been used for monitoring land, ocean and atmosphere. These applications have contributed to improve sustainable economy, produce healthy environment and enhance human life. The Advanced Research Workshop sponsored by NATO and organized by the USA's National Oceanic and Atmospheric Administration and Ukrainian's Space Agency bring the scientists with the most mature research designed for practical use. The goals were to select those which is used for services today and identify the areas to expand research and services. Scientific and application results of the Workshop presented in this book can be used today in agriculture, forestry, water resources, healthy coastal life and fisheries, climate and land cover change, anthropogenic activities and others. The presented papers provide information on how to use operational satellites and in situ measurements for early detection of large-scale droughts, floods and fires, diagnose crop and pasture annual losses, predict periods with health/unhealthy vegetation based on such climate forcing events as ENSO, monitor air quality and geomagnetic activities, assess land cover trends in responce to global warming etc. The available satellite/ground information and method is currently warn with a lead time sufficient to respond, recover and protect.

MARTENS Bob and BROWN Andre Co-conference Chairs, CAAD Futures 2005 Computer Aided Architectural Design is a particularly dynamic field that is developing through the actions of architects, software developers, researchers, technologists, users, and society alike. CAAD tools in the architectural office are no longer prominent outsiders, but have become ubiquitous tools for all professionals in the design disciplines. At the same time, techniques and tools from other fields and uses, are entering the field of architectural design. This is exemplified by the tendency to speak of Information and Communication Technology as a field in which CAAD is embedded. Exciting new combinations are possible for those, who are firmly grounded in an understanding of architectural design and who have a clear vision of the potential use of ICT. CAAD Futures 2005 called for innovative and original papers in the field of Computer Aided Architectural Design, that present rigorous, high-quality research and development work. Papers should point towards the future, but be based on a thorough understanding of the past and present.

In the policy arena, as well as in the academic world, a new challenge is having to deal with the global community. We are increasingly aware that the world is linked through economy-energy-environment interactions. We are increasingly aware, at the same time, that the emergence of the global community does not imply an integrated harmonious world; rather, it is a community where co- tries/regions of different interests and values face each other directly. Global governance has to be achieved through actions of national governments under different motives and constraints. We need to have an analytical tool that is capable of producing a global picture, yet with detailed country resolution. If the world is a better place now compared to 100 years ago in terms of p- capita income, this is due to the industrialization that continued throughout the 20th century. We entered the 21st century knowing that the human aspiration that translates into ever-increasing production may not be tenable in the long run. Sustainability of the global community is at stake. In contrast to inc- mental decision making through the market mechanism that should lead to some optimal state under some assumptions such as perfect knowledge, smooth movement of resources, no externalities, and so forth, we need to have an a- lytical tool to provide us with details of the future state of the world.

Recent developments in air pollution modelling are explored as a series of contributions from researchers at the forefront of their field. This book on air pollution modelling and its application is focused on local, urban, regional and intercontinental modelling; data assimilation and air quality forecasting; model assessment and evaluation; aerosol transformation; the relationship between air quality and human health and the effects of climate change on air quality. It consists of a series of papers that were presented at the 30th NATO/SPS International Technical Meeting on Air Pollution Modelling and its Application held in San Francisco, U.S.A., May 18-22, 2009. It is intended as reference material for students and professors interested in air pollution modelling at the graduate level as well as researchers and professionals involved in developing and utilizing air pollution models.