does tobacco contain tar Common substances in and their effects On health What Is Tar in Cigarettes

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Your care team may use: Spirometry : measures how well you move air Chest X-ray or CT scans: show lung changes Oxygen level checks: see how well your lungs deliver oxygen Medical history: including your smoking history and symptoms These tests are simple, and results can help guide your next steps

Synthetic nicotine is free from heavy metals, nitrosamines, and pesticide residues, offering a purer, more consistent formulation from batch to batch

Edison objected to cigarettes and refused to hire anyone who smoked them, on or off the job