Fig. 2: Spatial redistribution of solid wastes in the optimized cross-city symbiosis strategy for the BTH urban agglomeration.

Industry-related effects in (a) and Infrastructure-related effects in (b). The abbreviations of the cities in the BTH urban agglomeration are Beijing (BJ), Tianjin (TJ), Baoding (BD), Cangzhou (CZ), Chengde (CD), Handan (HD), Hengshui (HS), Langfang (LF), Qinhuangdao (QHD), Shijiazhuang (SJZ), Tangshan (TS), Xingtai (XT), and Zhangjiakou (ZJK).