Warnings of the extreme health risks of smoking cigarettes started to appear on packages in the '80's and '90's, and they're credited with helping to dramatically bring down smoking rate.

Today, U.S. Surgeon General Dr. Vivek Murthy announced he'd like to do something similar with social media:  a pop-up warning label on social media platforms advising parents that using the platforms might damage the mental health of adolescents.

Can it work?  KNX chief correspondent Charles Feldman posed that question to Karen North, she's founder of the USC's Annenberg’s Digital Social Media program.

In his argument for the warning label, Dr. Murthy says the power of social media has grown beyond the control of parents ... he argues that potential harms from social media "are the consequence of unleashing powerful technology without adequate safety measures, transparency or accountability."