In rooms where smoking has taken place regularly, tobacco’s imprint lingers on indoor surfaces, even long after regular smoking has stopped. The leftover residues, known as thirdhand smoke, can be a long-term source of indoor pollutants. New research from a team led by the Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab) zeroes in on carpets as an especially potent—and difficult to clean—reservoir of tobacco contaminants.
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Source: Phys.org