does harmless cigarette really work – QUITKIT E-cigarettes: How safe are they?
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Project 2)

The short answer: Because it can

Social isolation has become a global concern The World Health Organization (WHO) has reported that social isolation and loneliness affect 1 in 4 older adults and 515% of adolescents

Animal studies and some brain scans in humans provide reason for concern: Marijuana is psychoactive, and may cause structural brain changes