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What-If

Explore what could change.

Choose a place, a documented issue and one of its documented interventions, then set how far it goes.

ILLUSTRATIVE SCENARIO — NOT A SCIENTIFIC PREDICTION. Built from documented causes, impacts and solutions plus general qualitative patterns. It contains no modelled numbers.

3 · Intervention
PilotScaledTransformative

Adopted across much of the area, with dedicated budgets and enforcement.

Illustrative scenario

What if Bogotá took a scaled approach to “Electric bus fleet”?

Starting point · documented

AirSeverity: Moderate
Air quality and transport in Bogotá

Diesel vehicles and industry affect air quality, while bus rapid transit and cycling policy offer internationally studied responses.

The intervention · documented

Electric bus fleet

Replacing diesel buses with electric buses.

Reduces tailpipe emissions along bus corridors.

Schematic direction of change

Air quality tends to respond relatively quickly once emissions fall, although weather and regional sources still drive episodes.

Schematic, unitless illustration: relative pressure over time without the intervention compared with the intervention in place. Not based on measured data.NowLonger term →Relative pressure (unitless)
Without the intervention With the interventionSchematic shape only — no data, units or dates.

Causes this could address

  • Diesel vehiclesOlder buses and freight trucks emit fine particulate matter.

Impacts that could ease

  • Health effectsParticulate exposure is associated with respiratory and cardiovascular disease.
  • Unequal exposurePollution is often concentrated in lower-income districts.

Wider reach at higher intensity is an assumption of this illustration.

How change might unfold

  1. Near term

    Visible changes near targeted sources, especially where monitoring is dense.

  2. Medium term

    Fewer severe episodes if reductions cover the main local and regional sources.

  3. 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.

Read the sources for this issue