Fig. 5: The spatial characteristics of China’s subway material stocks. | Humanities and Social Sciences Communications

Fig. 5: The spatial characteristics of China’s subway material stocks.

From: Global urban subway development, construction material stocks, and embodied carbon emissions

Fig. 5

(a) Subway material stocks, geographical locations, and spatial boundaries of the 37 Chinese cities; and (b) The stock quantity and vertical distribution (above- and underground) by construction material and by component. Note: The five major urban agglomerations in a are ① Yangtze River Delta, ② Jing-Jin-Ji Metropolitan Region, ③ Pearl River Delta, ④ Middle Yangtze Plain, and ⑤ Cheng-Yu Metropolitan Region; the gray dashed line is the Hu Line.

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