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| Energy intensity in different sectors of the economy and energy embodied in trade of Beijing based on an input-output model |
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Abstract Based on an input-output model, indirect and total energy consumptions in different sectors of the economy, and energy embodied in domestic and international trade of Beijing were analyzed. Natural resource exploitation and processing industries top the list of the direct, indirect and total energy intensities, including petroleum processing and coking industry, metal smelting and rolling processing industry, non-metallic mineral product industry etc.. These industries should be chosen as key sectors to promote energy saving. Although direct energy intensities are low in building industry, fabricated metal product industry, and equipment manufacturing industries, indrect and total energy intensities are high because they consume plenty of resource-intensive products as intermediate inputs. For these industries, the reduce and recycle of resource-intensive products as intermediate inputs should be reinforced through the development of circular economy. In 2007, the net import of energy embodied in domestic and international trade of Beijing exceeded 44.377 M tce. Beijing had significantly lowered its own energy and environmental pressure by importing products of resource exploitation and processing industries, and exporting services and equipment manufacture products. The net import of energy embodied in domestic trade accounted for 90.47% of total net import of embodied energy, and dominated the reduce of the energy and environmental pressures of Beijing. At the same time, the domestic source region of embodied energy, especially neighboring districts also faced much greater resourse and environmental pressure for the export of embodied energy. Thus, it is necessary to adjust the market structure and promote technology diffusion to enhance the share of internationally imported embodied energy and reduce the regional environmental pressure from socio-economic development of Beijing.
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Received: 18 May 2011
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