| Summary: | This paper analyzes current urban symbiosis development and application in China, and then conducts a statistical analysis of the emissions reduction of CO2 and CH4 in relation to recovery of iron and steel scraps, waste paper, and waste plastics from 2011 to 2014 using the greenhouse gas (GHG) emission inventory calculation method provided by the IPCC. Results indicate that the cumulative recovery of renewable resources during China's main urban symbiosis development in 2011–2014 was 803.275 Mt, and the amount of iron and steel scraps, waste paper, and waste plastic recovery was the largest, respectively accounting for 62.2%, 18.0%, and 8.2% of total recovery in 2014. In addition, the cumulative emissions reduction of GHGs in relation to recovery of iron and steel scraps, waste paper, and waste plastics in 2011–2014 was 27.962 Mt CO2-eq, 954.695 Mt CO2-eq, and 22.502 Mt CO2-eq, respectively, thereby totaling 1005.159 Mt CO2-eq. Results show a remarkable GHG emissions reduction during 2011–2014.
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