城市每天运进比运出的物资多三倍。这多余的物资以城市扩展或污染物和废弃物的形式沉淀下来。它们如果在系统内循环使用,我们对外界的依赖度则降低,环境压力减轻,同时还能促进生产力,提高物资进出效率。这就是所谓的“循环经济”。巴塞罗那现在每年制造70万吨垃圾,平均每人每天1.3公斤,其中15%转化成能源,30%通过回收进入再循环。这个比例如想提高,关键在于发挥就近动员作用,也就是社区内循环。循环数字化制造实验室 The city shipped three times more materials than it shipped each day. This excess supplies have settled in the form of urban expansions or pollutants and wastes. If they are recycled in the system, our dependence on the outside world will be reduced, the pressure on the environment will be reduced, and at the same time, it will also promote productivity and increase the efficiency of materials entering and leaving. This is the so-called “circular economy.” Barcelona now produces 700,000 tons of rubbish per year, averaging 1.3 kilograms per person per day, of which 15% are converted into energy and 30% are recycled through recycling. If we want to improve this ratio, the key is to play the role of mobilization, that is, within the community cycle. Cyclic digital manufacturing laboratory