Firecrackers Caused 71% of Delhi's Smog the Night After Diwali. A Chief Minister Says Don't Worry.

Here is one sentence worth reading slowly, because it holds the whole story: between 1 am and 9 am on November 9, the morning after Diwali, while families in Jahangirpuri slept behind closed windows as the fine dust outside touched 4,985 micrograms per cubic metre at 3 am, and while Delhi's official air quality index climbed into the "severe" band, scientists at the Indian Institute of Tropical Meteorology in Pune worked out that 71.1% of the PM2.5 in the city's air had come from firecrackers, nearly ten times the 6.9% from vehicles.

Stop there. Breathe, if the air allows.

That number is new. IITM says it is the first time firecrackers have been counted separately in an official source estimate. The researchers also flag the limits: the window covers only 1 am to 9 am, and potassium, the usual marker for fireworks, is also released when crops and wood burn.

Two days later, in Lucknow, Uttar Pradesh Chief Minister Yogi Adityanath told a government event that if pollution had increased, "It will subside as well. Why are you worried?" He added that nobody questions those who "polluted the entire system" with corruption, yet one day of crackers becomes an issue.

That answer turns a health question into a culture fight, and it works on social media, where any mention of smog can be painted as an attack on the festival. It does nothing for a child's lungs.

Opposition voices and their online armies do not get a free pass either. Many post smog photos only in Diwali week, as a stick to beat the festival or the CM, and then go quiet. IITM's own data show why that is lazy: on November 7, firecrackers were just 5.6% of the PM2.5, and aerosols, biofuel burning and waste burning led. Those are the year-round sources that governments of every party, in Delhi and the states around it, have failed to cut.

Before you share the next smog post, ask:

• Which hours does the number cover, and who measured it?
• Is the leader answering the health question, or changing the subject?
• Does this account talk about clean air only one week a year?
• What would fix the other 51 weeks?

A slogan fits in a single line, but a fact about the air your lungs pull in twenty thousand times a day, from a night of celebration through a winter of stubble, traffic and burning rubbish, needs a longer sentence and a longer memory.

If a leader tells you not to worry about the air you breathe, whose lungs is he speaking for?

Sources: Indian Express, Hindustan Times, PTI (IITM assessment, Nov 10–11, 2026); The Hindu, PTI, NDTV, Scroll (Yogi Adityanath remarks, Nov 11, 2026).