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However, the leading cause of cigarettes sticky odor is the large amounts of tar vapors that cigarettes release

Consumers also often use both cigarettes and vapes, which makes it difficult to isolate harms from vaping alone

"Intuitively, smoking one cigarette instead of 20 [the number of cigarettes in a pack] should have about 1/20th the risk, and this is probably what many people feel is the case," Hackshaw says

The princess also made headlines for her relationships notably, her doomed relationships with her fathers former aide, Peter Townsend, and her failed marriage to Antony Armstrong-Jones

Vaping is widely considered far less harmful than smoking, though not completely risk free