Surgeon General Vivek Murthy is calling on Congress to authorize a surgeon general’s warning for social media, citing the technology as an important factor in a rising mental health crisis among children and teenagers.

“It is time to require a surgeon general’s warning label on social media platforms, stating that social media is associated with significant mental health harms for adolescents,” Murthy wrote in an opinion piece published on Monday. “The moral test of any society is how well it protects its children.”