The Environmental Protection Agency first warned of secondhand smoke in 1991, some 30 years after scientists determined that smoking cigarettes causes cancer. Today, a growing body of research points toward a new indirect health hazard.

Just as frequently being around other people while they smoke can cause cancer, heart disease, lung disease and other ailments, what I call “secondhand screen time” could be endangering children.

By not limiting their own phone use, parents and other caregivers may be unwittingly setting kids up to be addicted to screens.