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. 2017 Jul 19;3(7):e1700300. doi: 10.1126/sciadv.1700300

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 3 — (A) Per-capita energy mix of RRs, MUs, and URs in Beijing (a representative for the north of China) and Guangzhou (a representative for the south of China). Beijing and Guangzhou are the two cities where our questionnaire surveys were conducted. The per-capita energy consumption of RRs is calculated as the weighted average of per-capita rural energy consumption of all home provinces of the rural-urban migrants in that city. (B) Temporal trend of total RTC energy consumption by RRs in China. (C) Temporal trend of total RTC energy consumption by MUs in China. (D) Temporal trend of total RTC energy consumption by URs in China.