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      Impacts of EU carbon emission trade directive on energy-intensive industries — Indicative micro-economic analyses

      Ecological Economics
      Elsevier BV

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          The 1.7 Kilogram Microchip:  Energy and Material Use in the Production of Semiconductor Devices

          The scale of environmental impacts associated with the manufacture of microchips is characterized through analysis of material and energy inputs into processes in the production chain. The total weight of secondary fossil fuel and chemical inputs to produce and use a single 2-gram 32MB DRAM chip are estimated at 1600 g and 72 g, respectively. Use of water and elemental gases (mainly N2) in the fabrication stage are 32,000 and 700 g per chip, respectively. The production chain yielding silicon wafers from quartz uses 160 times the energy required for typical silicon, indicating that purification to semiconductor grade materials is energy intensive. Due to its extremely low-entropy, organized structure, the materials intensity of a microchip is orders of magnitude higher than that of "traditional" goods. Future analysis of semiconductor and other low entropy high-tech goods needs to include the use of secondary materials, especially for purification.
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            Carbon emissions from manufacturing energy use in 13 IEA countries: long-term trends through 1995

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              CO2 emission trading within the European Union and Annex B countries: the cement industry case

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                Author and article information

                Journal
                Ecological Economics
                Ecological Economics
                Elsevier BV
                09218009
                September 2007
                September 2007
                : 63
                : 4
                : 799-806
                Article
                10.1016/j.ecolecon.2007.02.002
                15c7860b-2a12-4ea8-8fa0-58cc66e20516
                © 2007

                http://www.elsevier.com/tdm/userlicense/1.0/

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