1. Energy Consumption per Unit of GDP (LCE2)
This indicator measures the energy intensity of economic output, reflecting the efficiency of energy use in production. A declining trend indicates decoupling of economic growth from energy consumption. It is a fundamental indicator for tracking progress towards a low-carbon economy -1-2.
References: -1-2.
2. Per Capita GDP (LCE1)
Per capita GDP reflects the overall economic development level of a society. Higher per capita GDP may indicate greater capacity to invest in low-carbon infrastructure and technologies, though it often correlates with higher consumption emissions -1-7.
References: -1-7.
3. Proportion of Tertiary Industry in GDP (LCE8)
The share of services in GDP indicates a shift away from energy-intensive manufacturing. A higher proportion of tertiary industry is generally associated with lower carbon intensity per unit of economic output -1-3.
References: -1-3.
4. Proportion of High-Tech Industry Value Added (LCE9)
High-tech industries are less resource-dependent and produce higher value with lower emissions. This indicator measures progress in industrial upgrading and technological advancement -1-3.
References: -1-3.
5. R&D Proportion (LCS2)
Research and development expenditure as a percentage of GDP reflects investment in innovation. R&D is critical for developing new low-carbon technologies and improving energy efficiency across all sectors -1-7.
References: -1-7.
6. Urbanization Rate (LCS1)
The proportion of urban population reflects the degree of urbanization. While urbanization can concentrate emissions, it also enables more efficient delivery of low-carbon infrastructure and services -1-3.
References: -1-3.
7. Population Density (LCS6)
Higher population density facilitates compact urban form, reducing travel distances and enabling more efficient public transport and district energy systems -1-7.
References: -1-7.
8. Per Capita Electricity Consumption (LCS7)
This indicator measures household electricity use per capita, reflecting both living standards and energy efficiency of appliances and housing -1-3.
References: -1-3.
9. Gas Penetration in Cities (LCS8)
The share of households using natural gas reflects the transition from coal-based heating and cooking to cleaner fuels -1-3.
References: -1-3.
10. Engel Coefficient (LCS5)
The proportion of household expenditure on food indicates living standards and consumption patterns. A declining coefficient may signal a shift toward higher value-added consumption, but also potentially higher embodied carbon -1-3.
References: -1-3.
11. Urban Road Area per Capita (LCS3)
This indicator reflects the availability of road infrastructure. While higher road density may improve mobility, it also encourages private vehicle use and associated emissions -1-3.
References: -1-3.
12. Traffic Volume (LCS4)
Traffic volume measures the number of vehicles on roads. Monitoring traffic volume is essential for assessing the impact of transport policies and the effectiveness of low-carbon mobility alternatives -1-3.
References: -1-3.
13. Days with Good Air Quality (LCEQ4)
The number of days with good air quality indicates the effectiveness of air pollution control measures. Low-carbon strategies often co-benefit air quality by reducing fossil fuel combustion -1-3.
References: -1-3.
14. Industrial Sulfur Dioxide Emissions (LCEQ3)
SO₂ emissions are a key indicator of industrial pollution from coal combustion. Reducing SO₂ emissions is often achieved alongside CO₂ reduction through fuel switching and efficiency improvements -1-3.
References: -1-3.
15. Industrial Solid Waste Comprehensive Utilization Rate (LCEQ1)
This indicator measures the proportion of industrial solid waste that is reused or recycled, reflecting progress towards a circular economy and reduced environmental burden -1-3.
References: -1-3.
16. Urban Household Garbage Harmless Disposal Rate (LCEQ2)
The share of municipal waste treated through harmless methods (e.g., incineration with energy recovery, landfill gas capture) indicates the effectiveness of waste management systems -1-3.
References: -1-3.
17. Sewage Treatment Rate (LCEQ7)
This indicator measures the proportion of domestic and industrial wastewater that is treated before discharge, reflecting environmental infrastructure quality and pollution control efforts -1-3.
References: -1-3.
18. Greenery Coverage of Urban Area (LCEQ5)
Green space coverage contributes to carbon sequestration and provides ecosystem services. It is a key indicator of urban environmental quality and carbon sink capacity -1-3.
References: -1-3.
19. Green Space per Capita (LCEQ6)
Public green space per resident reflects the quality of urban living environments and accessibility of nature for citizens -1-3.
References: -1-3.
20. Proportion of Environmental Protection Investment (LCEQ8)
The share of GDP invested in environmental protection indicates the commitment of resources to pollution control and ecological conservation -1-3.
References: -1-3.
21. Low-Carbon Policy Perfection Score (LCM2)
A qualitative score assessing the comprehensiveness of low-carbon policies, including public awareness, subsidies, and regulatory frameworks -1-3.
References: -1-3.
22. Low-Carbon Technology Perfection Score (LCM5)
This score evaluates the maturity of low-carbon technologies and the level of talent introduction, reflecting innovation capacity -1-3.
References: -1-3.
23. Low-Carbon Demonstration Project Score (LCM1)
A score indicating the number and quality of completed low-carbon demonstration projects, which serve as pilots for scaling up low-carbon solutions -1-3.
References: -1-3.
24. Reasonableness of Urban Planning Score (LCM4)
This score assesses the integration of low-carbon principles into urban planning, including land use, transport networks, and industrial zoning -1-3.
References: -1-3.
25. Perfection of Greenhouse Gas Accounting Score (LCM3)
This indicator measures the completeness and accuracy of greenhouse gas monitoring, reporting, and verification systems -1-3.
References: -1-3.
26. Green Factory Coverage Rate (SLCE3)
The share of industrial enterprises certified as green factories reflects the adoption of cleaner production and resource-efficient manufacturing -2.
References: -2.
27. Green Building Compliance Rate (SLCS4)
The proportion of new buildings meeting green building standards indicates the decarbonization of the building sector -2.
References: -2.
28. New 5G Base Station Site Sharing Rate (SLCS5)
Site sharing reduces land use and energy consumption for telecommunications infrastructure, contributing to overall resource efficiency -2.
References: -2.
29. Data Center Energy Use Efficiency (PUE) Compliance Rate (SLCS6)
PUE measures the energy efficiency of data centers. Lower PUE values indicate more efficient cooling and power management -2.
References: -2.
30. Carbon Inclusive Platform Completion Rate (SLCC1)
This indicator reflects the completeness of digital platforms that track and incentivize low-carbon behaviors by residents and businesses -2.
References
1. Tang, B. J., Hu, Y. J., et al. (2023). Low Carbon Indicator System / Carbon Neutrality Management Series. Beijing: Science Press.
This book systematically discusses the urban low carbon development assessment indicator system, covering multiple dimensions including economy, society, and environment, and serves as a key theoretical reference for this study.
2. Liu, X. M. (2016). Research on the Mechanism of Technology Promotion and Application in Low Carbon Communities. Beijing: Social Sciences Academic Press.
This work proposes an evaluation indicator system for low carbon communities and introduces key technologies for creating low carbon communities across various sectors.
3. Pang, B., & Fang, C. L. (2015). Research progress on smart low carbon towns. Progress in Geography, 34(9), 1135.
This paper systematically reviews the main indicator systems for measuring and evaluating smart low carbon towns, covering smart characteristics, low carbon features, and sustainability attributes.
4. Construction of evaluation indicator system for low carbon society. (2010). Science & Technology and Economy, (02).
Starting from the connotation and characteristics of a low carbon society, this study establishes a three level, multi indicator evaluation system and uses the Delphi method to determine the weights of relevant indicators at each level.
5. Qiu, S., Lin, J., Liu, D., et al. (2024/2025). Low Carbon City Development in China: Evaluation Results for More Than 100 Cities Around the World. Washington, DC: World Resources Institute & Chinese Academy of Environmental Planning.
This report constructs an assessment framework covering four domains—low carbon production, low carbon consumption, low carbon environment, and low carbon progress—innovatively selecting 11–15 representative indicators (e.g., carbon productivity, low carbon information index) to evaluate low carbon development in 102 cities worldwide.
6. Shao, J., Li, W., Long, Y., et al. (2025). Research on optimization of low carbon eco city indicator system in China from international comparison perspective. E3S Web of Conferences, 625, 01013.
Guided by the "carbon peaking and carbon neutrality" goals, this study examines low carbon eco city indicator systems in developed countries through an international comparative lens and proposes an optimization framework for China.
7. Smart low carbon city coupling coordination development evaluation indicator system. (2024). Nature Scientific Reports.
This paper provides an evaluation indicator system for smart low carbon cities, comprising five dimensions: Smart Low Carbon Economy (SLCE), Smart Low Carbon Society (SLCS), Smart Low Carbon Environmental Quality (SLCEQ), Smart Low Carbon Management (SLCM), and Smart Low Carbon Lifestyle (SLCL).
8. Low carbon city evaluation indicator system. (2024). NIH/PMC, Table 3 and Table A1.
This study presents a comprehensive low carbon city evaluation indicator system, covering Low Carbon Economy (LCE), Low Carbon Society (LCS), and Low Carbon Environment (LCE) domains.
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Additional General References
• Chen, T. (2025). A bibliometric review of low carbon city evaluation indicator systems. Sustainability, 17(2), 482.
This bibliometric review analyzes the evolution of low carbon city evaluation systems and identifies key research trends.
• Tan, S., Yang, J., Yan, J., et al. (2017). A holistic low carbon city indicator system for urban planning and development. Applied Energy, 185, 2026 2032.
This study develops a holistic indicator framework to guide low carbon urban planning and development practice.
• Li, W., Wang, W., & Song, C. (2024). Study on progress of the low carbon city evaluation indicator system in China under the "dual carbon" goal. International Journal of Environmental Research and Public Health, 21(8), 1013.
This paper reviews progress in low carbon city evaluation in China under the dual carbon goals.
• Wang, Z., Ma, L., & Yin, Z. (2024). Research on optimization of low carbon eco city indicator system in China from international comparison perspective. Environment, Development and Sustainability.
This study further explores optimization pathways for China's low carbon eco city indicators based on international benchmarking.
