Annual Review of Environment and Resources - Volume 42, 2017
Volume 42, 2017
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Plastic as a Persistent Marine Pollutant
Vol. 42 (2017), pp. 1–26More LessSynthetic organic polymers—or plastics—did not enter widespread use until the 1950s. By 2015, global production had increased to 322 million metric tons (Mt) year−1, which approaches the total weight of the human population produced in plastic every year. Approximately half is used for packaging and other disposables, 40% of plastic waste is not accounted for in managed landfills or recycling facilities, and 4.8–12.7 Mt year−1 enter the ocean as macroscopic litter and microplastic particles. Here, we argue that such mismanaged plastic waste is similar to other persistent pollutants, such as dichlorodiphenyltrichloroethane (DDT) or polychlorinated biphenyls (PCBs), which once threatened a “silent spring” on land. Such a scenario seems now possible in the ocean, where plastic cannot be easily removed, accumulates in organisms and sediments, and persists much longer than on land. New evidence indicates a complex toxicology of plastic micro- and nanoparticles on marine life, and transfer up the food chain, including to people. We detail solutions to the current crisis of accumulating plastic pollution, suggesting a Global Convention on Plastic Pollution that incentivizes collaboration between governments, producers, scientists, and citizens.
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African Environmental Change from the Pleistocene to the Anthropocene
Vol. 42 (2017), pp. 27–54More LessThis review explores what past environmental change in Africa—and African people's response to it—can teach us about how to cope with life in the Anthropocene. Organized around four drivers of change—climate; agriculture and pastoralism; megafauna; and imperialism, colonialism, and capitalism (ICC)—our review zooms in on key regions and debates, including desertification; rangeland degradation; megafauna loss; and land grabbing. Multiscale climate change is a recurring theme in the continent's history, interacting with increasingly intense human activities from several million years onward, leading to oscillating, contingent environmental changes and societally adaptive responses. With high levels of poverty, fast population growth, and potentially dramatic impacts expected from future climate change, Africa is emblematic of the kinds of social and ecological precariousness many fear will characterize the future globally. African people's innovation and adaptation to contingency may place them among the avant-garde with respect to thinking about Anthropocene conditions, strategies, and possibilities.
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The Intergovernmental Panel on Climate Change: Challenges and Opportunities
Vol. 42 (2017), pp. 55–75More LessThe Intergovernmental Panel on Climate Change (IPCC) conducts policy-relevant but not policy-prescriptive assessments of climate science. In this review, we engage with some of the key design features, achievements, and challenges that situate and characterize the IPCC as an intergovernmental organization that is tasked with producing global environmental assessments (GEAs). These include the process of working through consensus to assess and summarize climate science and the need to include knowledge from as many of the 195 IPCC nation-states as possible, despite the structural inequalities between developed and developing countries. To highlight salient features that are unique to the IPCC but that offer lessons for other organizations that conduct GEAs, we include case studies on the politics of climate denialism, the use of geoengineering in mitigation scenarios, and the links between adaptive capacity, adaptation, and global development. We conclude with a discussion of institutional reflexivity. We consider how the IPCC can model an ethical and participatory response to climate change by critically examining, and being transparent about, the relation between science and politics.
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The Concept of the Anthropocene
Vol. 42 (2017), pp. 77–104More LessThe Anthropocene, the concept that the Earth has moved into a novel geological epoch characterized by human domination of the planetary system, is an increasingly prevalent framework for debate both in academia and as a wider cultural and policy zeitgeist. This article reviews the proliferation of literature surrounding this concept. It explores the origins and history of the concept, as well as the arguments surrounding its geological formalization and starting date ranging from the Pleistocene to the twentieth century. It examines perspectives and critiques of the concept from the Earth system sciences, ecological and geological sciences, and social sciences and humanities, exploring its role as a cultural zeitgeist and ideological provocation. I conclude by offering a personal perspective on the concept of the Anthropocene and its utility.
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Marked for Life: Epigenetic Effects of Endocrine Disrupting Chemicals
Vol. 42 (2017), pp. 105–160More LessThe presence of human-made chemical contaminants in the environment has increased rapidly during the past 70 years. Harmful effects of such contaminants were first reported in the late 1950s in wildlife and later in humans. These effects are predominantly induced by endocrine disrupting chemicals (EDCs), chemicals that mimic the actions of endogenous hormones and leave marks at several levels of organization in organisms, from physiological outcomes (phenotypes) to molecular alterations, including epigenetic modifications. Epigenetic mechanisms play pivotal roles in the developmental processes that contribute to determining adult phenotypes, through so-called epigenetic programming. While there is increasing evidence that EDC exposure during sensitive periods of development can perturb epigenetic programming, it is unclear whether these changes are truly predictive of adverse outcomes. Understanding the mechanistic links between EDC-induced epigenetic changes and phenotypic endpoints will be critical for providing improved regulatory tools to better protect the environment and human health from exposure to EDCs.
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Degradation and Recovery in Changing Forest Landscapes: A Multiscale Conceptual Framework
Vol. 42 (2017), pp. 161–188More LessConceptual confusion revolves around how to define, assess, and overcome land, ecosystem, and landscape degradation. Common elements link degradation and recovery processes, offering ways to advance local, regional, and global initiatives to reduce degradation and promote the recovery of ecosystems and landscapes in forest biomes. Biophysical attributes of degradation and recovery can be measured, but the relevance of selected attributes across scales is subject to values that determine preferred states. Degradation defined in the context of a resilience-based approach is a state where the capacity for regeneration is greatly reduced or lost, recovery is arrested, core interactions and feedbacks are broken, and human intervention is required to initiate a trajectory of recovery. Another approach combines degradation and recovery processes through the concept of recovery debt, the cumulative lost benefits incurred, relative to a target state during phases of degradation and recovery. Degradation and recovery can also be described in terms of societal willingness to invest in improved management or restoration. Interventions can facilitate recovery to new stable or persistent states that provide multiple social and ecological benefits at land, ecosystem, and landscape scales. Multiple trajectories of recovery, as well as historic and ongoing chronic environmental change, might, however, mean that recovery to an original reference state is not possible.
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Drivers of Human Stress on the Environment in the Twenty-First Century
Vol. 42 (2017), pp. 189–213More LessHuman actions are transforming ecosystems across the globe. Six frameworks aid in understanding the forces that drive human stress on the environment and human responses to this stress. Two of them, the stochastic impacts by regression on population, affluence and technology (STIRPAT) model and decomposition analysis, are approaches to analyzing data. Four describe the interrelated system of human actions and environmental responses: driving forces, pressures, states, impacts, responses (DPSIR); the Millennium Ecosystem Assessment (MA) framework; coupled human and natural systems (CHANS) and telecoupling; and social-ecological systems (SES). In applying these frameworks, attention must be given to the scale of analysis and to the effects of context. In addition to the frameworks there are four substantial research literatures providing theory and empirical analysis of how drivers place stress on the environment: a macrocomparative tradition, work on household energy consumption, land change science, and research on commons. Although these traditions remain somewhat separate, they are largely complementary.
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Linking Urbanization and the Environment: Conceptual and Empirical Advances
Vol. 42 (2017), pp. 215–240More LessUrbanization is one of the biggest social transformations of modern time, driving and driven by multiple social, economic, and environmental processes. The impacts of urbanization on the environment are profound, multifaceted and are manifested at the local, regional, and global scale. This article reviews recent advances in conceptual and empirical knowledge linking urbanization and the environment, focusing on six core aspects: air pollution, ecosystems, land use, biogeochemical cycles and water pollution, solid waste management, and the climate. We identify several emerging trends and remaining questions in urban environmental research, including (a) increasing evidence on the amplified or accelerated environmental impacts of urbanization; (b) varying distribution patterns of impacts along geographical and other socio-economic gradients; (c) shifting focus from understanding and quantifying the impacts of urbanization toward understanding the processes and underlying mechanisms; (d) increasing focus on understanding complex interactions and interlinkages among different environmental, social, economic, and cultural processes; and (e) conceptual advances that call for articulating and using a systems approach in cities. In terms of governing the urban environment, there is an increasing focus on public participation and coproduction of knowledge with stakeholders. Cities are actively experimenting toward sustainability under a plethora of guiding concepts that manifests their aspirational goals, with varying levels of implementation and effectiveness.
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Debating Unconventional Energy: Social, Political, and Economic Implications
Vol. 42 (2017), pp. 241–266More LessThe extraction of unconventional oil and gas—from shale rocks, tight sand, and coalbed formations—is shifting the geographies of fossil fuel production, with complex consequences. Following Jackson et al.’s (1) natural science survey of the environmental consequences of hydraulic fracturing, this review examines social science literature on unconventional energy. After an overview of the rise of unconventional energy, the review examines energy economics and geopolitics, community mobilization, and state and private regulatory responses. Unconventional energy requires different frames of analysis than conventional energy because of three characteristics: increased drilling density, low-carbon and “clean” energy narratives of natural gas, and distinct ownership and royalty structures. This review points to the need for an interdisciplinary approach to analyzing the resulting dynamic, multilevel web of relationships that implicates land, water, food, and climate. Furthermore, the review highlights how scholarship on unconventional energy informs the broader energy landscape and contested energy futures.
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Emerging Technologies for Higher Fuel Economy Automobile Standards
Vol. 42 (2017), pp. 267–288More LessTransportation systems contribute significantly to air pollution and ∼15% globally and ∼25% in the United States to emissions climate-changing gases. In the United States, the Corporate Average Fuel Economy (CAFE) standards for motor vehicles were significantly raised in 2012 for the first time in almost three decades. The standards now call for an average across manufacturers of 54.5 miles per gallon (mpg) for new passenger cars by 2025, or 163 grams per mile (g/mi) of greenhouse gas (GHG) emissions, and of 47 mpg (196 g/mi) by 2021. The light truck standards, which include minivans and sport utility vehicles, call for fuel economy levels of 31 mpg (287 g/mi) in 2021 and of 40 mpg (222 g/mi) in 2025. Given approximately equal expected splits between car and light truck sales, these estimates imply combined car and light truck fleet averages of ∼40 to 41 mpg (217 to 222 g/mi) in 2021 and 50 mpg (178 g/mi) in 2025. However, because automakers have strategies to reduce GHGs in parallel with fuel economy, the actual in-use fuel economy of the fleet is expected to be somewhat lower. In this review, several automobile technology advances are described and assessed for providing relatively cost-effective solutions to meet CAFE standards for fuel economy and GHG reductions through 2025. The key points this review makes are that (a) loopholes in the current regulations will allow automakers to meet CAFE program goals with relatively minor incremental improvements to current technologies through 2025 and that (b) going beyond the current program, past 2025 to higher fuel economy levels and lower GHG emissions approaching 100 g/mi, is likely to involve heavier use of newer technologies especially including drivetrain electrification.
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The Future of Low-Carbon Electricity
Vol. 42 (2017), pp. 289–316More LessWe review future global demand for electricity and major technologies positioned to supply it with minimal greenhouse gas (GHG) emissions: renewables (wind, solar, water, geothermal, and biomass), nuclear fission, and fossil power with CO2 capture and sequestration. We discuss two breakthrough technologies (space solar power and nuclear fusion) as exciting but uncertain additional options for low-net GHG emissions (i.e., low-carbon) electricity generation. In addition, we discuss grid integration technologies (monitoring and forecasting of transmission and distribution systems, demand-side load management, energy storage, and load balancing with low-carbon fuel substitutes). For each topic, recent historical trends and future prospects are reviewed, along with technical challenges, costs, and other issues as appropriate. Although no technology represents an ideal solution, their strengths can be enhanced by deployment in combination, along with grid integration that forms a critical set of enabling technologies to assure a reliable and robust future low-carbon electricity system.
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Organic and Conventional Agriculture: A Useful Framing?
Vol. 42 (2017), pp. 317–346More LessIn this review, we examine the debate surrounding the role for organic agriculture in future food production systems. Typically represented as a binary organic–conventional question, this debate perpetuates an either/or mentality. We question this framing and examine the pitfalls of organic–conventional cropping systems comparisons. The review assesses current knowledge about how these cropping systems compare across a range of metrics related to four sustainability goals: productivity, environmental health, economic viability, and quality of life. We conclude by arguing for reframing the debate, recognizing that farming systems fall along gradients between three philosophical poles—industrial, agrarian, and ecological—and that different systems will be appropriate in different contexts. Despite evidence for lower yields in organic crop systems, we found considerable evidence for environmental and social benefits. Given these advantages, and the potential for improving organic systems, we echo calls for increased investment in organic and ecologically based cropping systems research and extension.
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Smallholder Agriculture and Climate Change
Vol. 42 (2017), pp. 347–375More LessHundreds of millions of the world's poorest people directly depend on smallholder farming systems. These people now face a changing climate and associated societal responses. We use mapping and a literature review to juxtapose the climate fate of smallholder systems with that of other agricultural systems and population groups. Limited direct evidence contrasts climate impact risk in smallholder agricultural systems versus other farming systems, but proxy evidence suggests high smallholder vulnerability. Smallholders distinctively adapt to climate shocks and stressors. Their future adaptive capacity is uncertain and conditional upon the severity of climate change and socioeconomic changes from regional development. Smallholders present a greenhouse gas (GHG) mitigation paradox. They emit a small amount of CO2 per capita and are poor, making GHG regulation unwarranted. But they produce GHG-intensive food and emit disproportionate quantities of black carbon through traditional biomass energy. Effectively accounting for smallholders in mitigation and adaption policies is critical and will require innovative solutions to the transaction costs that enrolling smallholders often imposes. Together, our findings show smallholder farming systems to be a critical fulcrum between climate change and sustainable development.
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The Future Promise of Vehicle-to-Grid (V2G) Integration: A Sociotechnical Review and Research Agenda
Vol. 42 (2017), pp. 377–406More LessVehicle-grid integration (VGI) describes various approaches to link the electric power system and the transportation system in ways that may benefit both. VGI includes systems that treat plug-in electric vehicles (PEVs) as controllable load with a unidirectional flow of electricity, such as “smart” or “controlled” charging or time-of-use (TOU) pricing. VGI typically encompasses vehicle-to-grid (V2G), a more technically advanced vision with bidirectional flow of electricity between the vehicle and power grid, in effect treating the PEV as a storage device. Such VGI systems could help decarbonize transportation, support load balancing, integrate renewable energy into the grid, increase revenues for electricity companies, and create new revenue streams for automobile owners. This review introduces various aspects and visions of VGI based on a comprehensive review. In doing so, it identifies the possible benefits, opportunities, and barriers relating to V2G, according to technical, financial, socio-environmental, and behavioral components. After summarizing our sociotechnical approach and the various opportunities and barriers indicated by existing literature, we construct a proposed research agenda to provide insights into previously understudied and unstudied research objectives. We find that the majority of VGI studies to date focus on technical aspects of VGI, notably on the potential of V2G systems to facilitate load balancing or to minimize electricity costs, in some cases including environmental goals as constraints. Only a few studies directly investigate the role of consumer acceptance and driver behavior within such systems, and barely any studies address the need for institutional capacity and cross-sectoral policy coordination. These gaps create promising opportunities for future research.
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Technology and Engineering of the Water-Energy Nexus
Vol. 42 (2017), pp. 407–437More LessThe global demand for water and energy is projected to grow, but there likely will be significant constraints in our ability to keep meeting it. These constraints will be imposed partly by the interdependence between water, energy, and climate change. If left unchecked, these connections can exacerbate water and energy shortages and aggravate climate change impacts: Energy is used to supply and treat water; moreover, emissions from energy generation contribute to climate change, which affects water supplies and increases the demand for energy to sustain Earth's growing population and economy. The linkage between water and energy can offer opportunities for better meeting expected demand while minimizing damage from shortages of either. This article focuses on the technological and engineering aspects of various connections in the water-energy nexus where advancements can enable greater supply of one or both. It also outlines the benefits and challenges associated with each connection.
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Landscape Approaches: A State-of-the-Art Review
Vol. 42 (2017), pp. 439–463More LessLandscape approaches have become en vogue in the past couple of decades. Originating from nineteenth-century landscape geography, this renewed popularity since the 1980s is fueled by debates on—among others—nature conservation, landscape restoration, ecosystem services, competing claims on land and resources, sectorial land-use policies, sustainable development, and sense of place. This review illuminates the ambition and potential of these landscape approaches for interdisciplinary and cross-sectoral collaboration. To show this, we work with a T-shaped interdisciplinary model. After a short history of the landscape approaches, we dive into their key dimensions—from ecology to economics and culture to politics. Thereafter, we bring these dimensions together again and reflect on the integrative potential of landscape approaches for offering common ground to various disciplines and sectors. Two examples of applications are also dealt with: a landscape governance framework and a landscape capability framework.
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Foreign Direct Investment and the Environment
Vol. 42 (2017), pp. 465–487More LessWe review the literature that investigates the relationship between foreign direct investment (FDI) and the environment. After reviewing the theoretical literature, we discuss two broad strands of research. First, the impact of environmental regulations on the choice of plant location and second, the impact of FDI on the emissions of various pollutants and the related question of whether we can observe environmental spillovers from foreign to domestic firms. Finally, we review the more recent literature on environmental outsourcing as an alternative to FDI and conclude with suggestions for future research.
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Land Tenure Transitions in the Global South: Trends, Drivers, and Policy Implications
Vol. 42 (2017), pp. 489–507More LessClouded titles to land in remote rural areas of the Global South have recently prevented increases in agricultural productivity and payments for environmental services (PES), so making land tenure more secure has become a priority for policymakers. The historical dynamics surrounding land tenure transitions suggest a strategy for reform. Colonial regimes stripped indigenous peoples of most rights to land. Newly independent states restored these rights for some smallholders through land reforms. Later, neo-liberal regimes made secure titles more expensive, and, in so doing, made insecure land tenure more pervasive. Spots of secure land tenure did emerge when indigenous groups, with outside support, resisted efforts by powerful outsiders to expropriate indigenous homelands. Because insecure land tenure persists in most forested rural areas, a focus on afforestation in deforested areas, where earlier episodes of reform secured smallholder land tenure, offers a promising direction for future PES and REDD+ (Reducing Emissions from Deforestation and Degradation) efforts.
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Ecosystem Services from Transborder Migratory Species: Implications for Conservation Governance
Vol. 42 (2017), pp. 509–539More LessThis article discusses the conservation challenges of volant migratory transborder species and conservation governance primarily in North America. Many migratory species provide ecosystem service benefits to society. For example, insectivorous bats prey on crop pests and reduce the need for pesticides; birds and insects pollinate food plants; and birds afford recreational opportunities to hunters and birdwatchers. Migration is driven by the seasonal availability of resources; as resources in one area become seasonally scarce, individuals move to locations where resources have become seasonally abundant. The separation of the annual lifecycle means that species management and governance is often fractured across international borders. Because migratory species depend on habitat in different locations, their ability to provide ecosystem services in one area depends on the spatial subsidies, or support, provided by habitat and ecological processes in other areas. This creates telecouplings, or interconnections across geographic space, of areas such that impacts to the habitat of a migratory species in one location will affect the benefits enjoyed by people in other locations. Information about telecoupling and spatial subsidies can be used to craft new governance arrangements such as Payment for Ecosystem Services programs that target specific stakeholder groups and locations. We illustrate these challenges and opportunities with three North American case studies: the Duck Stamp Program, Mexican free-tailed bats (Tadarida brasiliensis mexicana), and monarch butterflies (Danaus plexippus).
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Legacies of Historical Human Activities in Arctic Woody Plant Dynamics
Vol. 42 (2017), pp. 541–567More LessRecent changes in arctic vegetation might not be driven by climate change alone. Legacies of human activities have received little attention as a contributing factor. We examine the extent to which traditional human activities (hunting, herding, fire, wood extraction, and agriculture) have had lasting effects on arctic woody plant communities and therefore might continue to affect biome-wide responses to climate change. Evidence suggests that legacies are likely to be evident across meters to hundreds of kilometers and for decades, centuries, and millennia. The evidence, however, is currently sparse, and we highlight the potential to develop systematic assessments through a circumarctic collaboratory consisting of a network of interdisciplinary field sites, standardized protocols, participatory research, and new approaches. We suggest that human activities should be brought into consideration to increase our understanding of arctic vegetation dynamics in general and to assess woody plant responses to climate change in particular.
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Toward the Next Generation of Assessment
Vol. 42 (2017), pp. 569–597More LessThrough integrative assessment, experts evaluate the state of knowledge on complex problems relevant to societies. In this review, we take stock of recent advances and challenges, rooting our analysis in climate change assessment. In particular, we consider four priorities in assessment: (a) integrating diverse evidence including quantitative and qualitative results and understanding, (b) applying rigorous expert judgment to evidence and its uncertainties, (c) exploring widely ranging futures and their connections to ongoing choices and actions, and (d) incorporating interactions among experts and decision makers in assessment processes. Across these assessment priorities, we survey past experiences, current practices, and possibilities for future experimentation, innovation, and learning. In our current era of climate and broader global change, integrative assessment can bolster decisions about contested and uncertain futures. We consider both opportunities and pitfalls in synthesizing and encompassing evidence and perspectives. Our aim is to advance transparent assessment for a sustainable future.
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Sustainability Transitions Research: Transforming Science and Practice for Societal Change
Vol. 42 (2017), pp. 599–626More LessThe article describes the field of sustainability transitions research, which emerged in the past two decades in the context of a growing scientific and public interest in large-scale societal transformation toward sustainability. We describe how different scientific approaches and methodological positions explore diverse types of transitions and provide the basis for multiple theories and models for governance of sustainability transitions. We distinguish three perspectives in studying transitions: socio-technical, socio-institutional, and socio-ecological. Although the field as a whole is very heterogeneous, commonalities can be characterized in notions such as path dependencies, regimes, niches, experiments, and governance. These more generic concepts have been adopted within the analytical perspective of transitions, which has led three different types of approaches to dealing with agency in transitions: analytical, evaluative, and experimental. The field has by now produced a broad theoretical and empirical basis along with a variety of social transformation strategies and instruments, impacting disciplinary scientific fields as well as (policy) practice. In this article, we try to characterize the field by identifying its main perspectives, approaches and shared concepts, and its relevance to real-world sustainability problems and solutions.
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Attribution of Weather and Climate Events
Vol. 42 (2017), pp. 627–646More LessWithin the past decade, the attribution of extreme weather and climate events has emerged from a theoretical possibility into a subfield of climate science in its own right, providing scientific evidence on the role of anthropogenic climate change in individual extreme weather events, on a regular basis and using a range of approaches. Different approaches and thus different framings of the attribution question lead to very different assessments of the role of human-induced climate change. Although there is no right or wrong approach, the community is currently debating about the appropriate methodologies for addressing various stakeholder needs and scientific limitations. Tackling these limitations with more thorough model evaluation and meaningful bias corrections as well as going beyond the meteorological hazard and attributing the full impacts of extreme weather are the main challenges to face in the coming years.
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Material Flow Accounting: Measuring Global Material Use for Sustainable Development
Vol. 42 (2017), pp. 647–675More LessThe growing extraction of natural resources and the waste and emissions resulting from their use are directly or indirectly responsible for humanity approaching or even surpassing critical planetary boundaries. A sound knowledge base of society's metabolism, i.e., the physical exchange processes between society and its natural environment and the production and consumption processes involved, is essential to develop strategies for more sustainable resource use. Economy-wide material flow accounting (MFA) is a framework that provides consistent compilations of the material inputs to national economies, changes in material stocks within the economic system, and material outputs to other economies and the environment. We present the conceptual foundations of MFA and derived indicators and review the current state of knowledge of global patterns and trends of extraction, trade, and use of materials. We discuss the relation of material use and economic development and the decoupling of material use from economic growth in the context of sustainable resource use policies.
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The Impact of Systematic Conservation Planning
Vol. 42 (2017), pp. 677–697More LessSystematic conservation planning (SCP) is a rapidly advancing discipline aimed at providing decision support for choices between alternate conservation actions. SCP is often used to inform choices about areas to protect, in order to optimize outcomes for biodiversity while minimizing societal costs. Despite the widespread application of SCP approaches, there is limited understanding of the types of impacts resulting from related projects, and when and where it is most effective. This is compounded by the absence of a standardized approach to evaluating and reporting on the outcomes of SCP projects. We highlight the challenges of undertaking evaluations of complex planning processes, the current state of knowledge about the outcomes of SCP projects, and emerging opportunities to improve evaluation. There is a need for clarity around theories of change, definitions of SCP and impact, and standardized reporting and information sharing across the discipline.
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Previous Volumes
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Volume 48 (2023)
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Volume 47 (2022)
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Volume 46 (2021)
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Volume 45 (2020)
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Volume 44 (2019)
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Volume 43 (2018)
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Volume 42 (2017)
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Volume 41 (2016)
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Volume 40 (2015)
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Volume 39 (2014)
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Volume 38 (2013)
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Volume 37 (2012)
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Volume 36 (2011)
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Volume 35 (2010)
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Volume 34 (2009)
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Volume 33 (2008)
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Volume 32 (2007)
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Volume 31 (2006)
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Volume 30 (2005)
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Volume 29 (2004)
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Volume 28 (2003)
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Volume 27 (2002)
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Volume 26 (2001)
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Volume 25 (2000)
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Volume 24 (1999)
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Volume 23 (1998)
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Volume 22 (1997)
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Volume 21 (1996)
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Volume 20 (1995)
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Volume 19 (1994)
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Volume 18 (1993)
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Volume 17 (1992)
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Volume 16 (1991)
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Volume 15 (1990)
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Volume 14 (1989)
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Volume 13 (1988)
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Volume 12 (1987)
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Volume 11 (1986)
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Volume 10 (1985)
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Volume 9 (1984)
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Volume 8 (1983)
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Volume 7 (1982)
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Volume 6 (1981)
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Volume 5 (1980)
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Volume 4 (1979)
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Volume 3 (1978)
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Volume 2 (1977)
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Volume 1 (1976)
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Volume 0 (1932)