Cities concentrate a large part of the world economy today. Understanding how the urban economy and its decision making function as well as how they are connected to a larger world (regional, national, global) is fundamental to create governance mechanisms and the institutions to move the world towards a green economy. This paper analyses the city through its key economic processes of the transformation of space; circulation (transport); consumption and production and social, knowledge and ecosystem services. Transforming urban processes will only be achieved with better urban governance. As governance is embedded in institutions, it is the foundation for building the legitimate political and social mechanisms to green socio-ecological and economic systems. Yet the question of whether or not current governance systems in these processes are steering cities towards a greener economy, or if they are, how are they affecting people and ecosystems is yet to be addressed.
This empirical paper focuses on the relationship between changes in GDP and CO2 emissions as a country's economy moves through periods of growth and decline. Using a comprehensive panel, the author documents substantial heterogeneity in the relationship across countries. Specifically, countries can be classified into one of the following groups: Group D (for decline) includes countries where the emissions growth rate is more strongly associated with the GDP growth rate in periods of GDP decline than in periods of GDP growth. Group G (for growth) includes countries where the degree of association is stronger in perods of GDP growth. Finally in Group D (for symmetrical) it is not possible to reject the hypothesis that the relationship is the same for growth and decline. According to a simple count criterion, approximately a third of the countries in the sample fall into each group. Notably China and the US, currently the world's largest emitters by a substantial margin, are in group D. These results have potentially important consequences for long-term emissions projections.
Reducing emissions from agriculture, forestry, and other land uses is considered an essential ingredient of an effective strategy to mitigate global warming. Required changes in land use and forestry, however, often imply foregoing returns from locally more attractive resource use strategies. In this paper, the authors assess and compare the prospects of mitigating climate change through emission reductions from forestry and agriculture in the Brazilian Amazon. They use official statistics, literature, and case study material from both old and new colonization frontiers to identify the scope for emission reductions, in terms of potential additionality, opportunity costs, technological complexity, transaction costs, and risks of economic and environmental spillover effects. Their findings point to a comparative advantage in the Brazilian Amazon of forest conservation-based over land-use modifying mitigation options, especially in terms of higher potential additionality in emission reductions. Low-cost mitigation options do exist also in use-modifying agriculture and forestry, but tend to be technologically complex thus requiring more costly interventionschemes.
This book describes comprehensively potential, co-benefits and drawbacks of carbon (C) sequestration for ecosystem services. Soil generates numerous ecosystem services for human wellbeing and ecological functions. The services discussed include provisional (feed, food, timber, biofuel), regulating (carbon sequestration, pests, diseases), cultural, and supporting (soil formation, nutrient cycling) services. Recarbonization of the biosphere is a potential strategy to redistribute C among global pools, and to enhance ocean but most importantly land-based C sinks with possible feedback on soil-based ecosystem services. Land use and soil management can degrade soil quality, and either reduce quantity and quality of ecosystem services or lead to disservices and create large ecological footprint. Thus, trade-offs between carbon sequestration and ecosystem services must be considered when incentivizing land managers through payments for ecosystem services. Together with sustainable management of land-based C sinks for climate change adaptation and mitigation this will minimize the risks of recarbonization of the biosphere for ecological functions and human wellbeing.