Illustrative scenario
What if Beijing took a scaled approach to “Coal-to-gas and coal-to-electricity conversion”?
Starting point · documented
Severe winter smog prompted sustained national and regional action, and fine particulate levels have fallen substantially since 2013.
The intervention · documented
Coal-to-gas and coal-to-electricity conversion
Replacing coal boilers and household stoves with gas and electric heating.
Large reductions in winter particulate and sulphur dioxide emissions.
Schematic direction of change
Air quality tends to respond relatively quickly once emissions fall, although weather and regional sources still drive episodes.
Causes this could address
- Coal combustion for heating and industryCoal boilers and household coal stoves were major winter emission sources.
Impacts that could ease
- Public health burdenLong-term exposure to fine particulate matter is linked to heart and lung disease and premature death.
- Disruption and emergency measuresRed alerts triggered school closures, traffic restrictions and factory shutdowns.
Wider reach at higher intensity is an assumption of this illustration.
How change might unfold
Near term
Visible changes near targeted sources, especially where monitoring is dense.
Medium term
Fewer severe episodes if reductions cover the main local and regional sources.
Long term
Health benefits accumulate as long-term exposure falls.
Faded stages are less likely to be reached at scaled intensity.
What this would not change
Pollution transported from outside the area, and seasonal meteorology, remain beyond local control.
What it depends on
- Sustained funding and institutional capacity
- Consistent enforcement and monitoring
- Local stakeholder support
- Participation of affected communities
ILLUSTRATIVE SCENARIO — NOT A SCIENTIFIC PREDICTION. Built from documented causes, impacts and solutions plus general qualitative patterns. It contains no modelled numbers.