Through forward-backward relation in the city matter cycle system,energy consumption will have effects on environment from resource production to using and waste deserted.

• 城市生态经济系统是一个由“环境-资源-生产-消费-环境”组成的物质循环系统,在这一物质循环系统中消费通过前后向关联,从生产到资源利用和直接向环境排放废弃物两个方向影响着城市环境。