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India in Pixels by Ashris on X: "How many cigarettes per day are you smoking if you are living in #Delhi NCR? Source: https://t.co/4hu92TZnVq [22.5 ppm of PM2.5 equivalent to one cigarette
If someone smoked 2 packs of cigarettes a day for 40+ years and is healthy would it be risky for them to abruptly stop? - Quora
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