tero bau
Externalities can cause market failure if the full social costs and social benefits of production and consumption are not taken into account.
I think you mean "does social networking cause a decrease in school grades?" If it does you clearly shouldn't use any.
yes
Depression and lack of social activity
to change social patterns that cause inequality (APEX)
the people lack of education
Slavery
cause it related to pschology
no friends
cause it related to pschology
Beans, when ingested, frequently cause gas. Farting. That can have a negative impact on your social life.