Marijuana use among teens is thought to be more widespread than alcohol use. Yet, many parents still don't believe their teen would ever smoke pot.
There are also many misconceptions about marijuana—especially now that medical marijuana is being used by many people with health conditions and many states are legalizing pot use.
Many parents also think pot must be harmless because they believe it's a "natural herb." But studies show marijuana can have harmful effects on a teen's developing brain.