India, Dec. 14 -- Atovio Pebble wearable air purifier review: I spent close to three weeks using the Atovio Pebble every day, wearing it at home, at work, during commutes, and in some of the worst AQI days Delhi had this season. On paper, it sounds like a clever fix for people who hate wearing masks all day. It is light, it hangs around your neck, it has no filters, and the company leans heavily on lab-tested ionisation metrics to prove that it can clean the air immediately around your face.After living with it, the broader picture is simpler. In lab-like still air, the Pebble can reduce particulate exposure. But in real-world outdoor pollution, especially when AQI goes past 300 or touches 700, the Pebble's effectiveness falls sharply and...