Related Experiment Video
Updated: Jun 23, 2026

07:12
Façade-Level Monitoring of CO2 Variability under Urban Heat Island Conditions using Low-Cost Sensor Data Loggers
Published on: December 12, 2025
Urban-scale and urban cluster-scale: how population agglomeration shapes carbon emission intensity
Haoqing Zheng1, Chunli Ji2, Huafeng Wang3
1School of Business, Shaoxing University, No. 900 Chengnan Avenue, Yuecheng, Shaoxing, 312000, Zhejiang, China.
Carbon Balance and Management
|June 21, 2026
Summary
Population agglomeration at urban and urban cluster scales impacts carbon emission intensity (CEI). Larger urban clusters can mitigate the U-shaped CEI curve caused by urban-scale population growth.
Area of Science:
- Environmental Science
- Urban Studies
- Economics
Background:
- Urban clusters are key to carbon reduction efforts.
- The interactive effects of urban and urban cluster population agglomeration on carbon emission intensity (CEI) are understudied.
Purpose of the Study:
- To analyze the dual-scale impact of population agglomeration on CEI.
- To investigate how urban cluster-scale agglomeration moderates the urban-scale agglomeration-CEI relationship.
Main Methods:
- Developed a dual-scale analytical framework.
- Utilized panel data for 221 Chinese cities across 19 urban clusters (2011-2022).
- Employed a two-way fixed effects model.
Main Results:
- A U-shaped relationship exists between urban-scale population agglomeration and CEI.
- Urban cluster-scale population agglomeration significantly flattens this U-shaped curve.
- Green technological innovation and functional co-agglomeration are key moderating channels.
Conclusions:
- Coordinated population agglomeration strategies at multiple scales are crucial for carbon reduction.
- The moderating effect of urban cluster agglomeration is stronger in eastern coastal and polycentric clusters, and within limited geographic ranges.
Related Concept Videos
Sampling Plans
Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
Random sampling is a method where each member of the population has an equal chance of being selected for the sample. It involves selecting individuals randomly, often using random number generators or lottery-type methods. For example, when analyzing the properties of a...
The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
Population Growth
Population size is dynamic, increasing with birth rates and immigration, and decreasing with death rates and emigration. In ideal conditions with unlimited resources, populations can increase exponentially, which plots as a J-shaped growth rate curve of population size against time. This type of curve is characteristic of newly-introduced invasive species, or populations that have suffered catastrophic declines and are rebounding.However, realistic environmental conditions limit the number of...
What is Climate?
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.