Air quality is a health emergency nobody owns

The deadliest health threat I've lived closest to isn't a virus or a diagnosis. It's the air. In Dhaka, breathing on a bad winter morning is a measurable assault on the lungs of twenty million people at once, and almost no one is formally accountable for fixing it. That combination, enormous harm and no clear owner, is exactly what makes air quality the most under-worked public-health problem I know.

Who owns air quality as a health emergency?

Dhaka's air periodically ranks the single worst in the world, with the Air Quality Index spiking into the "hazardous" range, past 300, on the worst days. Across 2025 the city's fine-particle pollution averaged around 68 micrograms² per cubic meter, roughly 13 times² the World Health Organization's guideline of 5, and Bangladesh ranked as the second-most-polluted country³ on earth. This isn't mysterious. Nearly 85%⁴ of it comes from just three sources: brick kilns, road and construction dust, and vehicle exhaust. A problem with three named causes is a problem you can actually design against.

America learned this the hard way too

For years, wealthy countries treated air pollution as someone else's crisis. Then the wildfire smoke came, orange skies over New York, air-quality alerts across whole US regions, millions of people checking an AQI app for the first time in their lives. The lesson landed the way it always does in health: a threat feels abstract until it's in your own lungs. The US and Bangladesh are now, improbably, working the same problem, one from chronic industrial haze, one from climate-driven smoke.

This is a communication problem as much as an engineering one

Cleaner kilns and better transit matter enormously. But I've spent seventeen years on the other half, getting people to change behavior around a health risk they can't see. Invisible, slow, and collective is the hardest possible profile for a health message: no symptom today, no single villain, no obvious action. That is precisely the kind of campaign I've built and measured. For my MPH capstone I locked the measurement framework up front and documented a repeatable ~3× reach; with the Lifebuoy hotline we delivered health guidance through an object people already trusted, at roughly 3,000 calls a day. Air quality needs that discipline: segment who's most exposed, translate an AQI number into one clear action, and deliver it through channels people already use.

The builder's opening

The optimistic read: this is a newly tractable problem. Low-cost sensors, satellite data, and AI now make hyperlocal air data cheap where it was once impossible. The missing layer is the same one it always is, turning that data into trusted, timely, act-on-it-now guidance for the people breathing the worst of it. That's a dual-market opportunity hiding in plain sight, and it's built on skills, measurement and behavior change, I already have receipts for.

The short version

• Dhaka's PM2.5 runs ~13× the WHO¹ limit; the city periodically has the world's worst air, ~85% from three fixable sources.
• US wildfire smoke turned the same invisible threat into a shared, personal one.
• The hard half is behavior and communication around a risk with no symptom and no owner, my core work.
• Cheap sensors and AI make the data tractable; the opening is trusted, act-now guidance.

What invisible risk are the people you serve exposed to daily, and who is actually accountable for helping them act on it?

Md Shafaat Ali Choyon (MPH, CHES®, MBA, MCIM) is a growth, marketing and public-health strategist who builds and runs AI in production, with 17 years across telecom, fintech, e-commerce, consumer tech and healthcare in the US and Bangladesh. See the essays or the portfolio.