Interactive Tool

The BreathAir Simulator

Twelve escalating levels. Brutal budgets. Real atmospheric science. Save the sky if you can — then experiment freely in Sandbox mode.

Challenge Mode

Save the Sky — 12 Levels × 4 Difficulties

Pick your difficulty. Each level locks the world into a polluted baseline. Spend your Clean Action Budget to throttle sources and deploy solutions. Reduce AQI below the target without going over budget. Watch the sky respond to every choice.

Live sky · AQI 83

Level 1Citizen

Suburban Sunday

A quiet day. Show the basics.

Current AQI

Target AQI

≤ 100

Budget Remaining

115

of 115

Status

VICTORY

Spent: 0Budget: 115

Level cleared on Citizen — ★★★

3★ = clear with 30%+ budget unspent · 2★ = 10%+ · 1★ = squeaked by

Deploy Solutions

Throttle Sources (costs 0.6c per %)

Cars· baseline 40%

−0%

Diesel· baseline 10%

−0%

Buses· baseline 20%

−0%

Planes· baseline 5%

−0%

Ships· baseline 5%

−0%

Factories· baseline 10%

−0%

Power· baseline 30%

−0%

Homes· baseline 30%

−0%

Why it's hard: Budgets are too tight to brute-force. Solutions overlap — stacking three won't reach 100% reduction. Hazards multiply pollution at the worst moments. On Engineer difficulty, Level 12 demands surgical allocation. Each difficulty has its own unlock progression — clearing Cadet doesn't unlock Engineer.

Sandbox Mode

Free-Play Atmosphere

Experiment without constraints — see how every pollutant, vehicle, and clean alternative changes the air.

Air Quality Index

173

Unhealthy

PM2.5

5.9 µg/m³

NOx

7.7 ppb

CO2

22.8 tons

Health Impact

Everyone may begin to experience health effects.

Lung function57%

Heart health65%

Vulnerable groups42%

Hazardous level — protect children, elderly, and those with respiratory conditions.

Pollution Sources

Gasoline Cars

transport

30%

Diesel Trucks

transport

30%

Buses

transport

30%

Motorcycles

transport

30%

Airplanes

transport

30%

Cargo Ships

transport

30%

Factories

industry

30%

Coal Power Plants

industry

30%

Residential Heating

home

30%

Traffic Congestion

40%

Stop-and-go traffic dramatically increases per-mile emissions and local PM2.5 hotspots.

Vehicle Type Comparison

Gasoline

4.6

tons CO2/yr

Diesel

5.1

tons CO2/yr

Hybrid

2.3

tons CO2/yr

Electric

1.1

tons CO2/yr

Air, water, and climate are one system

The pollutants that foul our air also acidify oceans, weaken forests, alter weather patterns, and warm the planet. Cleaner air protects H2O, ecosystems, and the climate — all at once. The choices you simulate here scale up to entire cities, nations, and generations.