Table 1.
The description of 18 selected indicators.
| Indicators | Description |
|---|---|
| Air pollution and associated weather-climate conditions | |
| Changes in air quality | Analyze the annual changes in various air pollution concentrations in the key regions as well as the national scale during 2015–2020. |
| Variations in adverse meteorological conditions | Quantify the contribution of meteorological factors to the interannual variation in PM2.5 concentration; Analyze the impact of interannual variations of total radiation and relative humidity on the O3 concentration. |
| Climate change and its impact on air pollution | Explore the trend of climate change in China; Summarize the relevant research on the impact of climate change on air pollution; Analyze the impact of future climate change on the uncertainties of air quality prediction. |
| Progress in structural transition | |
| Transition of the energy structure | Present the remarkable achievements in the energy efficiency improvement and low-carbon development. |
| Transition of the industrial structure | Track the remarkable achievements in the industrial optimization and structural upgrade in China. |
| Transition of the transportation structure | Summarize the progress in the transformation of transportation structure, including energy efficiency improvement, clean energy substitution, transportation structure optimization, and urban transportation sustainability. |
| Progress in air pollution control | Summarize the implementation progress of eight key measures in China's air pollution control from 2013 to 2020. |
| Zero-carbon and carbon-negative technologies | Track the overall progress of zero-carbon and carbon-negative technologies in China; Analyze their future development trends considering technical feasibility and economic affordability. |
| Sources, sinks, and mitigation pathway of atmospheric composition | |
| Anthropogenic CO2 emissions | Track the dynamic changes and driving forces of China's CO2 emissions. |
| Emissions of air pollutants and progress of coordinated control | Analyze the trajectories of key air pollutants’ emissions (i.e., SO2, NOx, primary PM2.5, and VOCs) and the progress of synergetic mitigation of CO2 emissions over the last two decades. |
| Land use change and land carbon sinks | Summarize contemporary understandings of the magnitude of China's land carbon sinks; Evaluate the factors affecting the land carbon sink quantification and the impacts of land use change on the land carbon balance. |
| Future mitigation potentials and synergetic pathway | Analyze the synergetic mitigation pathways of China's CO2 and air pollutants emissions based on a series of established future emission scenarios. |
| Health impacts and benefits of coordinated control | |
| Health impacts of air pollution | Analyze the impacts of long-term and short-term PM2.5 and O3 exposures in China on mortality. |
| Health impacts of climate change | Analyze health impacts of different extreme climate events by summarizing the relevant achievements in the field of climate change and health impact. |
| Health co-benefits of carbon reduction | Discuss the public health impacts and co-benefits by reviewing the related studies. |
| Synergetic governance system and practices | |
| Construction of a synergetic governance system | Review the progress in the construction of the synergetic governance system from strategic planning, laws and regulations, and the management system. |
| Economic policies for synergetic governance | Review China's economic policies for synergetic controls of environmental pollution and CO2 emissions in recent years. |
| Local practices | Summarize the progress of city-level air quality improvement and low-carbon practices; Analyze the city-level synergetic achievements of carbon emission reductions and air quality improvements. |