| Jiaozuo city was taken as a representative industry city and its industry energy consumption and industry emissions such as wastewater,solid waste,SO2,dust and so on were selected as corresponding environmental loads.The contribution rate to the environmental loads and eco-efficiencies of Jiaozuo industry sectors were analyzed quantitatively.The results show that,the industry sector with the highest energy eco-efficiency is Mining and Processing of Ferrous Metal Ores (FMM),43.19×104 yuan·tce-1,and its contribution rate is 0.003%;the one with the highest wastewater-related eco-efficiency is Manufacture of Transport Equipment (TRM),3.58×104 yuan·t-1,and its contribution rate is 0.0001%;the one with the highest solid waste-related eco-efficiency is Manufacture of Special Purpose Machinery(SMM),323.22×104 yuan·t-1,and its contribution rate is 0.005%;the one with the highest SO2 emission-related eco-efficiency is Manufacture of Special Purpose Machinery(SMM),19.74×104 yuan·kg-1,and its contribution rate is 0.0001%;the one with the highest dust emission-related eco-efficiency is Manufacture of Rubber(RUM),6.75×104 yuan·kg-1,and its contribution rate is 0.001%.It can be seen that the industry sector with high value of eco-efficiency always contributes less to its environmental load,which results that the industry sectors with high eco-efficiencies only play a weak role in leading the overall industry eco-efficiency.A succinct distance index (SDI) was proposed to estimate the differences between Jiaozuo and China average for their eco-efficiency of every industrial sector.The values of SDI range from -1 to 63.45,and the absolute value of SDI with positive value is much greater than that with negative value,which indicates that the values of eco-efficiencies for the advanced industry sectors of Jiaozuo city are much higher than those for China's industry sectors average. |
