New Delhi, Dec. 16 -- The air outside still feels trapped. On Monday, Delhi NCR woke up to very dense fog and severe air, with reports placing AQI around 450 and higher at a few hotspots. Visibility and pollution together disrupted the day, with flight cancellations, train delays, and hospitals reporting more cases of eye irritation and breathing trouble.

With GRAP Stage IV back after AQI crossed 450, the strictest curbs are in place again, yet the bigger issue is how winter weather can hold pollution down even when restrictions return. That is why we focus on air purifiers that target what most homes are dealing with right now, PM2.5 particles and lingering smoke or odours, using True HEPA and activated carbon filters, then narrowing pi...