> surveys a nationally representative group of teens each year Self reported with nothing actual to verify (e.g., hair sample, school sewer water sample, etc.)

> surveys a nationally representative group of teens each year Self reported with nothing actual to verify (e.g., hair sample, school sewer water sample, etc.) Self-reported data is notorious for being unreliable. Why would this be any different? Editorial: What a waste of time and money. Hopefully taxpayers aren't paying for this.