The cement ecological footprint of China is calculated with component approach for the first time. The experience formula of CO2 emission intensity of cement industry is deduced. It is a linear relation between the emission intensity and the unit comprehensive energy consumption in cement industry. The unit emission quality of CO2 can be cut down by reducing the unit comprehensive energy consumption, in turn the cement ecological footprint decreased. The cement total ecological footprint (EFc) of China is growing, from 1.57×108hm2(2000) to 2.61×108hm2(2006). The yearly average increase 8.81% of EFc is lower than 12.91% of total output of cement. Since 2004, the former is lower than the latter, obviously. The unit cement yield ecological footprint decreases every year, which is from 0.2632hm2/t (2000) to 0.2109hm2/t (2006).The result shows clearly that the energy conservation and emission reduction effect is appearing in China cement industry. From the constitution of the cement ecological footprint, the ecological footprints of CO2 and NOx reach an absolute proportion (above 90%). The main reason lies in the cement industry high energy consumption. This fact indicates that, to reduce the EFc, it is necessary to decrease energy consumption of cement industry.
国家科技期刊平台
NSTL
万方数据
维普
