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Electricity end-use and construction activity are key leverage points for co-controlling greenhouse gases and local pollution in China

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Abstract

Greenhouse gas (GHG) and pollutant emissions are closely related to the economic structure. Most of the existing studies focused on single type of emissions and cannot provide guidance for co-controlling multiple emissions. Here, we provide an improved elasticity method based on input-output model that relates both supply and demand side at high resolution, evaluated for GHG emissions, local air pollution, solid waste, health, water quality, and economy-wide welfare metrics. The method allows to identify high-resolution structural adjustment intervention points that combine reduction in GHG emission and local environmental damage with stable performance in economy-wide welfare. Investigating the Chinese economy, our results show that key leverage points for simultaneously reducing GHG and local pollutants include electricity inputs of various industries, building materials inputs of housing construction, and fertilizer inputs of agriculture. Therefore, emerging political interventions include reducing the fertilizer use in agriculture, improving the electricity efficiency in raw chemical materials manufacturing and in the metal products industry, and saving inputs of steel, cement, and other building materials in construction, e.g., by transition to prefabricated or 3D printing construction. Urban households can reshape final demand by moderating electricity consumption and adjusting investments in real estate. Reduced export of low-value added steel and metal products would further improve environment and contribute to global climate change mitigation.

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Notes

  1. The CO2 emission inventory in the CEADs database is compiled according to the energy data of the China Bureau of Statistics, and the sector classification is consistent with the input and output table adopted by this study. Therefore, the CO2 emission data in this study are preferred.

  2. Two key points need to be emphasized in the mapping process between GAINS activities and Chinese IO sectors. One is that according to the activity description in GAINS, notes on the classification of national economy sectors in China, Chinese greenhouse gas compilation guidelines, and combining the advice of experts in various industry fields, we identified the sector where each activity takes place. For example, “Agglomeration plant-pellets” activity belongs to “Ferrous metals” sector, and “Other cattle” activity belongs to “Animal products” sector. Another point is that some activities take place in more than one sector (e.g., “Industrial furnaces” activity will need to be matched with multiple sectors using industrial furnaces); in this case, we used a strong hypothesis that various sectors have same emission intensity (emissions per unit of output). Thus, we decomposed these activities into multiple sectors according to their output level.

  3. The author calculates from the following data sources: National Bureau of Statistics, GAINS database, and CEADs database.

  4. According to the classification and interpretation of national economy industry, the products in heat of production and supply industry mainly include steam and hot water, and the business includes the supply and sales of steam and hot water and the maintenance and management of heating facilities. The downstream are final consumers, and the heat are mainly used for winter heating in northern heating areas. And electricity is used for all aspects of production and life, so the consumption of electricity and heat production and supply industry here mainly refers to electricity consumption.

  5. The direct electricity consumption during the production and supply of electricity and heat (e_h→e_h) is not considered as input data do not allow for disentangling transmission and distribution electricity requirements from electricity at production. In detail, according to the results, the transaction (e_h→e_h) has the largest elasticity for GHGs and other air pollutants emissions. However, this is mainly due to the statistical reason. Since 2002, China has implemented a power system reform policy of separating the power generation side from the power grid side; thus, the self-use electricity and transmission and distribution cannot be separated in the input-output table, which is a main reason for the significantly larger elasticity. Moreover, transmission and distribution account for the majority of the value. Therefore, we would not discuss these transactions here.

  6. The effects on employment have also been calculated. However, this effect is less than 0.02% in most cases thus is not shown in the figures, but will be mentioned in the text whenever necessary.

  7. It should be noted that China only imposes a carbon tax on the electricity sector, and the agricultural sector is exempt from environmental tax. According to Figure 3, the tax incentives for the agricultural sector and the steel sector are significantly less than are the results at the present stage, but the tax incentives for the electricity sector and the other remaining sectors are not significantly reduced.

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Acknowledgements

The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (72074022, 71422011, and 71521002), National Key Research and Development Program of China (2016YFA0602600) and China Postdoctoral Science Foundation (2020M680398).

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Correspondence to Qiao-Mei Liang.

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Liu, LJ., Liang, QM., Creutzig, F. et al. Electricity end-use and construction activity are key leverage points for co-controlling greenhouse gases and local pollution in China. Climatic Change 167, 19 (2021). https://doi.org/10.1007/s10584-021-03167-0

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