According to a Business Standard entitled "Third-Hand Smoke Just as Lethal as First-Hand Smoke": "A scientist at the University of California, Riverside suggests that second-hand smoke and third-hand smoke are just as deadly as first-hand smoke. While first-hand smoke refers to the smoke inhaled by a smoker and second-hand smoke to the exhaled smoke and other substances emanating from the burning cigarette that can get inhaled by others, third-hand smoke is the second-hand smoke that gets left on the surfaces of objects, ages over time and becomes progressively more toxic."

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