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E-Cigarette Use: Significant amount of Cancer-causing Chemicals Stays in Lungs

E-cigarettes have become increasingly popular as a smoke-free alternative to conventional tobacco cigarettes, but the health effects of "vaping" on humans have been debated in the scientific and tobacco manufacturing communities.

While aldehydes—chemicals like formaldehyde that are known to cause cancer in humans—have been identified in e-cigarette emissions by numerous studies, there has been little agreement about whether such toxins exist in large enough quantities to be harmful to users.