Decomposition analysis of COD and SO2 emission reduction of industry from 2006 to 2009

Based on the decomposition analysis, COD and SO2 emission reduction of industry was divided into scale effect, structure effect, clean technology effect and pollution control effect, and of which the effects from 2006 to 2009 were calculated. The results indicate that: first, the scale effect caused increase of COD and SO2 emission, while structure effect, clean technology effect and pollution control effect promoted reduction of COD and SO2 emission; second, agro-food processing industry and non-metallic mineral products industry should be controlled for their too fast development; third, the COD producing intensity in chemical fiber manufacturing industry and SO2 producing intensity in electricity, thermal production and supply industry, non-ferrous metal mineral industry, oil and nuclear fuel processing industry were increasing, and their clean production should be encouraged; fourth, the removing rate of COD in gas production and supply industry, leather production industry and SO2 in non-metallic mineral production industry, non-metallic mineral processing industry, gas production and supply industry were decreased, and it was necessary to strengthen its surveillance.