The Experts below are selected from a list of 1599 Experts worldwide ranked by ideXlab platform
Emanuele Massetti - One of the best experts on this subject based on the ideXlab platform.
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trade of woody biomass for electricity generation under climate mitigation policy
Resource and Energy Economics, 2014Co-Authors: Alice Favero, Emanuele MassettiAbstract:Abstract Bio-energy with carbon capture and sequestration (BECCS) has the potential to be a key mitigation option, because it can generate electricity and absorb emissions at the same time. However, biomass is not distributed evenly across the globe and regions with a potentially high demand might be constrained by limited domestic supply. Therefore, climate mitigation policies might create the incentive to trade biomass internationally. This paper uses scenarios generated by the integrated assessment model WITCH to study trade of woody biomass from multiple perspectives: the volume of biomass traded, its value, the impact on other power generation technologies and on the efficiency of mitigation policy. The policy scenarios consist of three representative carbon tax policies (4.8 W/m 2 , 3.8 W/m 2 and 3.2 W/m 2 radiative forcing values in 2100) and a cap-and-trade scheme (3.8 W/m 2 in 2100). Results show that the incentive to trade biomass is high: at least 50% of biomass consumed globally is traded internationally. Regions trade 13–69 EJ/yr of woody biomass in 2050 and 55–81 EJ/yr in 2100. In 2100 the value of biomass traded is equal to US$ 0.7–7.2 Trillion. Trade of woody biomass substantially increases the efficiency of the mitigation policy. In the tax scenarios, abatement increases by 120–323 Gt CO 2 over the century. In the cap-and-trade scenario biomass trade reduces the price of emission allowances by 34% in 2100 and cumulative discounted policy costs by 14%.
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trade of woody biomass for electricity generation under climate mitigation policy
Social Science Research Network, 2013Co-Authors: Alice Favero, Emanuele MassettiAbstract:Bio-energy has the potential to be a key mitigation option if combined with carbon capture and sequestration (BECCS) because it generates electricity and absorbs emissions at the same time. However, biomass is not distributed evenly across the globe, and regions with a potentially high demand might be constrained by limited domestic supply. Therefore, climate mitigation policies might create the incentive to trade biomass internationally. This paper uses scenarios generated by the integrated assessment model WITCH to study trade of woody biomass from multiple perspectives: the volume of biomass traded, its value, the impact on other power generation technologies and on marginal abatement costs. The policy scenarios consist of three representative carbon tax policies (4.8 W/m2, 3.8 W/m2 and 3.2 W/m2 radiative forcing in 2100) and a cap-and-trade scheme (3.8 W/m2 in 2100). Results show that the incentive to trade biomass is high: at least 50% of biomass consumed globally is from the international market. Regions trade 13-69 EJ/yr of woody biomass in 2050 and 55-81 EJ/yr in 2100. In 2100 the value of biomass traded is equal to US$ 0.7-7.2 Trillion. Trade of woody biomass sensibly reduces marginal abatement costs. In the tax scenarios, abatement increases by 120-323 Gt CO2 over the century. In the cap-and-trade scenario biomass trade reduces the price of emission allowances by 34% in 2100 and cumulative discounted policy costs by 14%.
Naota Hanasaki - One of the best experts on this subject based on the ideXlab platform.
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economic aspects of virtual water trade
Environmental Research Letters, 2017Co-Authors: Taikan Oki, Shinjiro Yano, Naota HanasakiAbstract:Although water is rarely traded over long distances by itself, the total weight of the water consumed to produce traded commodities exceeds the weight of any other commodity traded in the world. This concept is known as virtual water trade. Although space-/time-/commodity-based quantification has been conducted extensively, the underlying causes of this peculiar feature have thus far received little exploration. Here, we use estimates of water consumption from a global hydrological model and statistical data related to food trade to elucidate three facts that explain the fundamental nature of virtual water trade with respect to alleviating water scarcity. First, we quantitatively illustrate the unique position of water among commodities based on its unit price and quantity of sales. Water has an extremely low unit price, and a tremendous volume of water is consumed per person each day. Second, we show that rich but water-scarce countries tend to reduce local water consumption by importing virtual water. Third, we demonstrate that nations characterized by net virtual water exports have higher water resources and income per capita and that no countries fall below a certain threshold with respect to both GDP and water resources. These points suggest that the virtual water trade is explained by economic characteristics of water and that sustainable development depends on promoting the co-development of poverty alleviation and water resource development.
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temporal dynamics of blue and green virtual water trade networks
AGUFM, 2012Co-Authors: M. Konar, Naota Hanasaki, Carole Dalin, Andrea Rinaldo, Ignacio RodrigueziturbeAbstract:Global food security increasingly relies on the trade of food commodities. Freshwater resources are essential to agricultural production and are thus embodied in the trade of food commodities, referred to as “virtual water trade.” Agricultural production predominantly relies on rainwater (i.e., “green water”), though irrigation (i.e., “blue water”) does play an important role. These different sources of water have distinctly different opportunity costs, which may be reflected in the way these resources are traded. Thus, the temporal dynamics of the virtual water trade networks from these distinct water sources require characterization. We find that 42 × 109 m3 blue and 310 × 109 m3 green water was traded in 1986, growing to 78 × 109 m3 blue and 594 × 109 m3 green water traded in 2008. Three nations dominate the export of green water resources: the USA, Argentina, and Brazil. As a country increases its export trade partners it tends to export relatively more blue water. However, as a country increases its import trade partners it does not preferentially import water from a specific source. The amount of virtual water that a country imports by increasing its import trade partners has been decreasing over time, with the exception of the soy trade. Both blue and green virtual water networks are efficient: 119 × 109 m3 blue and 105 × 109 m3 green water were saved in 2008. Importantly, trade has been increasingly saving water over time, due to the intensification of crop trade on more water-efficient links.
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water for food the global virtual water trade network
Water Resources Research, 2011Co-Authors: M. Konar, Naota Hanasaki, Carole Dalin, Andrea Rinaldo, Samir Suweis, Ignacio RodrigueziturbeAbstract:We present a novel conceptual framework and methodology for studying virtual water trade. We utilize complex network theory to analyze the structure of the global virtual water trade associated with the international food trade. In the global virtual water trade network, the nations that participate in the international food trade correspond to the nodes, and the links represent the flows of virtual water associated with the trade of food from the country of export to the country of import. We find that the number of trade connections follows an exponential distribution, except for the case of import trade relationships, while the volume of water that each nation trades compares well with a stretched exponential distribution, indicating high heterogeneity of flows between nations. There is a power law relationship between the volume of virtual water traded and the number of trade connections of each nation. Highly connected nations are preferentially linked to poorly connected nations and exhibit low levels of clustering. However, when the volume of virtual water traded is taken into account, this structure breaks down. This indicates a global hierarchy, in which nations that trade large volumes of water are more likely to link to and cluster with other nations that trade large volumes of water, particularly when the direction of trade is considered. Nations that play a critical role in maintaining the global network architecture are highlighted. Our analysis provides the necessary framework for the development of a model of global virtual water trade aimed at applications ranging from network optimization to climate change impact evaluations.
Taikan Oki - One of the best experts on this subject based on the ideXlab platform.
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economic aspects of virtual water trade
Environmental Research Letters, 2017Co-Authors: Taikan Oki, Shinjiro Yano, Naota HanasakiAbstract:Although water is rarely traded over long distances by itself, the total weight of the water consumed to produce traded commodities exceeds the weight of any other commodity traded in the world. This concept is known as virtual water trade. Although space-/time-/commodity-based quantification has been conducted extensively, the underlying causes of this peculiar feature have thus far received little exploration. Here, we use estimates of water consumption from a global hydrological model and statistical data related to food trade to elucidate three facts that explain the fundamental nature of virtual water trade with respect to alleviating water scarcity. First, we quantitatively illustrate the unique position of water among commodities based on its unit price and quantity of sales. Water has an extremely low unit price, and a tremendous volume of water is consumed per person each day. Second, we show that rich but water-scarce countries tend to reduce local water consumption by importing virtual water. Third, we demonstrate that nations characterized by net virtual water exports have higher water resources and income per capita and that no countries fall below a certain threshold with respect to both GDP and water resources. These points suggest that the virtual water trade is explained by economic characteristics of water and that sustainable development depends on promoting the co-development of poverty alleviation and water resource development.
Raymond Jansen - One of the best experts on this subject based on the ideXlab platform.
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Unravelling the Pangolin Bushmeat Commodity Chain and the Extent of Trade in Ghana
Human Ecology, 2016Co-Authors: Maxwell Kwame Boakye, Antoinette Kotze, Desiré L. Dalton, Raymond JansenAbstract:Pangolins (Pholidota: Manidae) are frequently hunted as a source of bushmeat in Ghana. However, no information exists with regards to the level of trade of pangolins outside of major bushmeat market surveys in Ghana. The aim of this study was to determine the level of trade among other stakeholders in the bushmeat commodity chain for pangolins in Ghana. Data were collected from 153 stakeholders using semi-structured interviews and direct observation between September 2013 and January 2014. A total of 341 pangolins were recorded to have been traded in this study period. The white-bellied pangolin (Phataginus tricuspis) represented 82 % and the black-bellied pangolin (Phataginus tetradactyla) 18 % of the observed pangolins traded by the stakeholders. Chopbar operators accounted for the highest retailer sales to consumers. The number of pangolins traded was negatively correlated to the distance between settlements and protected forest regions. The levels of pangolin trade were previously underestimated in Ghana as the pangolin bushmeat commodity chain does not form the supply chain to the major bushmeat markets where most surveys were undertaken. The Wildlife Conservation Act of 1971 (LI 685) that prohibits the hunting of pangolins can be regarded as ineffective and not serving as a deterrent to poaching.
Dennis Wichelns - One of the best experts on this subject based on the ideXlab platform.
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virtual water and water footprints do not provide helpful insight regarding international trade or water scarcity
Ecological Indicators, 2015Co-Authors: Dennis WichelnsAbstract:Many authors have estimated the virtual water content of good and services traded internationally, and many have calculated national water footprints that account for the volumes of virtual water imported and exported. Some authors have suggested that international trade of virtual water has been harmful to selected exporting countries with limited water endowments. Some suggest also that current patterns of international trade should be rearranged to make better use of global water resources. Yet, countries do not actually trade in virtual water. They trade in goods and services for which water is one of many inputs. Wise choices regarding water resources and smart strategies regarding international trade cannot be determined by focusing on water alone. The notions of virtual water and water footprints are not helpful indicators of optimal strategies regarding water resources, particularly when considering issues such as water scarcity or international trade. I describe four perspectives regarding virtual water and water footprints, with the goal of demonstrating the inadequacies of these notions in policy discussions and in efforts to determine the optimal allocation and use of water resources. The four perspectives are: (1) international trade should not be modified or regulated to reflect the virtual water content of traded commodities or water footprints in the countries of trading partners, (2) countries do not save water by engaging in virtual water trade, (3) consumers in one country cannot alleviate water scarcity or improve water quality in other countries, and (4) water footprints are not analogous to carbon or ecological footprints.
