Diana Liverman

A safe operating space for humanity

Identifying and quantifying planetary boundaries that must not be transgressed could help prevent human activities from causing unacceptable environmental change, argue Johan Rockstrom and colleagues.

Accumulation by Decarbonization and the Governance of Carbon Offsets

Abstract This article examines the governance of international carbon offsets, analyzing the political economy of the origins and governance of offsets. We examine how the governance structures of the Kyoto Protocol’s Clean Development Mechanism and unregulated voluntary carbon offsets differ in regulation and in complexity of the chain that links consumers and reducers of carbon, with specific consequences for carbon reductions, development, and the ability to provide “accumulation by decarbonization.” We show how carbon offsets represent capital-accumulation strategies that devolve governance over the atmosphere to supranational and nonstate actors and to the market.

Global sustainability: Toward definition

Sustainability is increasingly viewed as a desired goal of development and environmental management. This term has been used in numerous disciplines and in a variety of contexts, ranging from the concept of maximum sustainable yield in forestry and fisheries management to the vision of a sustainable society with a steady-state economy. The meaning of the term is strongly dependent on the context in which it is applied and on whether its use is based on a social, economic, or ecological perspective, Sustainability may be defined broadly or narrowly, but a useful definition must specify explicitly the context as well as the temporal and spatial scales being considered. Although societies differ in their conceptualizations of sustainability, indefinite human survival on a global scale requires certain basic support systems, which can be maintained only with a healthy environment and a stable human population. A clearer understanding of global sustainability and the development of appropriate indicators of the status of basic support systems would provide a useful framework for policy making.

Four degrees and beyond: the potential for a global temperature increase of four degrees and its implications

The 1992 UN Framework Convention on Climate Change commits signatories to preventing ‘dangerous anthropogenic interference with the climate system’, leaving unspecified the level of global warming that is dangerous. In the late 1990s, a limit of 2°C global warming above preindustrial temperature was proposed as a ‘guard rail’ below which most of the dangerous climate impacts could be avoided. The 2009 Copenhagen Accord recognized the scientific view ‘that the increase in global temperature should be below 2 degrees Celsius’ despite growing views that this might be too high. At the same time, the continued rise in greenhouse gas emissions in the past decade and the delays in a comprehensive global emissions reduction agreement have made achieving this target extremely difficult, arguably impossible, raising the likelihood of global temperature rises of 3°C or 4°C within this century. Yet, there are few studies that assess the potential impacts and consequences of a warming of 4°C or greater in a systematic manner. Papers in this themed issue provide an initial picture of the challenges facing a world that warms by 4°C or more, and the difficulties ahead if warming is to be limited to 2°C with any reasonable certainty. Across many sectors—coastal cities, agriculture, water stress, ecosystems, migration—the impacts and adaptation challenges at 4°C will be larger than at 2°C. In some cases, such as farming in sub-Saharan Africa, a +4°C warming could result in the collapse of systems or require transformational adaptation out of systems, as we understand them today. The potential severity of impacts and the behavioural, institutional, societal and economic challenges involved in coping with these impacts argue for renewed efforts to reduce emissions, using all available mechanisms, to minimize the chances of high-end climate change. Yet at the same time, there is a need for accelerated and focused research that improves understanding of how the climate system might behave under a +4°C warming, what the impacts of such changes might be and how best to adapt to what would be unprecedented changes in the world we live in.

Who Governs, at What Scale and at What Price? Geography, Environmental Governance, and the Commodification of Nature

G eography has much to offer a world in which environmental change is widespread and where new actors, scales, and metrics are transforming environmental decisions. With a disciplinary core that embraces human–environment relations and regional difference, geography can take a leading role in shaping environmental and international alternatives in the twenty-first century through research, training, and involvement in public policy. Two of the most important emerging themes in environmental management are the commodification of nature and the reworking of environmental governance to include consumers, corporations, environmental groups, and transnational institutions. These themes are topics of vigorous political and intellectual debate concerning whether and how to put a price on environmental services and who should make environmental decisions. Pricing nature and governing the environment are important elements of the discussions of how to respond to processes of globalization and global environmental change and their impacts on people around the world. Geographers can engage these discussions from a variety of perspectives and roles, for example, as ardent critics of environmental economics or activists against globalization, or as those who work within environmental management to develop and refine the metrics of environmental valuation and new institutions of governance.

Navigating the Anthropocene: Improving Earth System Governance

The United Nations conference in Rio de Janeiro in June is an important opportunity to improve the institutional framework for sustainable development. Science assessments indicate that human activities are moving several of Earths sub-systems outside the range of natural variability typical for the previous 500,000 years (1, 2). Human societies must now change course and steer away from critical tipping points in the Earth system that might lead to rapid and irreversible change (3). This requires fundamental reorientation and restructuring of national and international institutions toward more effective Earth system governance and planetary stewardship.

Developing adaptation and adapting development

Climate change is upon us. The fourth assessment report of the Intergovernmental Panel on Climate Change clearly describes the evidence of a changing climate (IPCC 2007a,b). Although scientists disagree about the extent to which these changes will happen, they do agree that there have been and will be changes in average climatic conditions, there will be changes in the frequency and intensity of weather hazards, already variable climates will become less predictable, and there is considerable uncertainty about the distribution and impact of these changes. Actions to reduce the human contribution to the changing climate are slowly happening, but they so far seem too few and too limited to make a significant difference to the climate change scientists predict. What has become clear is that people from all countries, from all income levels, and irrespective of capacity to do so, will have to adapt to these changes. The development and climate research communities have much to learn from each other in helping people with these adaptations.

Global sustainability: Toward measurement

AbstractThe widespread interest in the concept of sustainable environment and development has been accompanied by the need to develop useful systems of measurement. We discuss the use of indicators which might be used to assess such conditions. Our characteristics, or criteria, for desirable global sustainability indicators are:sensitivity to change in timesensitivity to change across space or within groupspredictive abilityavailability of reference or threshold valuesability to measure reversibility or controllabilityappropriate data transformationintegrative abilityrelative ease of collection and use We discuss the basis of these characteristics, and examine two categories of indicators (soil erosion and population) and two specific indicators (physical quality of life index and energy imports as a percentage of consumption) for their value as sustainability measures.

Hell and High Water: Practice-Relevant Adaptation Science

Adaptation requires science that analyzes decisions, identifies vulnerabilities, improves foresight, and develops options. Informing the extensive preparations needed to manage climate risks, avoid damages, and realize emerging opportunities is a grand challenge for climate change science. U.S. President Obama underscored the need for this research when he made climate preparedness a pillar of his climate policy. Adaptation improves preparedness and is one of two broad and increasingly important strategies (along with mitigation) for climate risk management. Adaptation is required in virtually all sectors of the economy and regions of the globe, for both built and natural systems (1).

Planetary Opportunities: A Social Contract for Global Change Science to Contribute to a Sustainable Future

The global change research community needs to renew its social contract with society by moving beyond a focus on biophysical limits and toward solution-oriented research to provide realistic, context-specific pathways to a sustainable future. A focus on planetary opportunities is based on the premise that societies adapt to change and have historically implemented solutions—for example, to protect watersheds, improve food security, and reduce harmful atmospheric emissions. Daunting social and biophysical challenges for achieving a sustainable future demand that the global change research community work to provide underpinnings for workable solutions at multiple scales of governance. Global change research must reorient itself from a focus on biophysically oriented, global-scale analysis of humanitys negative impact on the Earth system to consider the needs of decisionmakers from household to global scales.