The Brave New World of A.I.-Powered Self-Harm Alerts

The Brave New World of A.I.-Powered Self-Harm Alerts

New technology alerts schools when students type words related to suicide. But do the timely interventions balance out the false alarms?
E.P.A. Again Seeks Limits on a Harmful Pesticide

E.P.A. Again Seeks Limits on a Harmful Pesticide

After a court overturned a ban, the agency has proposed restricting chlorpyrifos to 11 food crops, illustrating the limits of federal regulation.