Abstract
Based on the time series data from 1990 to 2012,with the expanded IPAT model, the economic-environment coefficient (GT) was constructed to measure the impact of economic growth on the environmental technologies. The results showed that there was a diminishing trend of the impact in the period of 1990 -1998 except the year of 1996, meaning the coordinated development between economic growth and environment technologies. In order to further analyze the measures and methods of energy saving and emission reduction, DEA model was using for the calculation of input redundancy and output deficit value. The results revealed that the coal consumption keeps Pareto optimal all the time. The emission of pollution decreased and the employment rate increased gradually. The input redundancy decreased to efficiency in the second and third industries.
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