If the aroma of mango or pineapple is strong enough, cops may have no idea when an individual is smoking an illegal substance right in front of them.

Vaping devices, officials and anti-drug advocates warn, are a growing concern because of their ability to deliver not only nicotine, but marijuana in vapor form, and more dangerous drugs such as cocaine and heroin.

The problem struck a nerve in Gloucester Township in late May when an officer, during a traffic stop, seized thousands of e-cigarette cartridges filled with THC oil — the primary agent involved in creating a marijuana "high."

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