A new study, which included 4,000 Connecticut teens, has found that about 20% students who used electronic cigarettes to vaporize nicotine also used the cigarettes to smoke pot. According to researchers of the study, they have found evidence that high school students are using e-cigarettes to vaporize marijuana.

The study published in the journal Pediatrics on Monday was conducted by Meghan Morean, researcher from Oberlin College in Ohio, and some colleagues. In the paper, the researchers warned that rising use of e-cigarettes could encourage youngsters to use it to vaporize cannabis.

Researcher Morean said in an email, "Forms of cannabis that can be vaporized, like hash oil, can be many times stronger than marijuana that is smoked". A recent study revealed the use of e-cigarettes could encourage teens in the US to move to conventional cigarette smoking.

The United States Centers for Disease Control and Prevention (CDC) said that use of e-cigarettes is increasing with every passing day. Last year, approximately 2 million middle and high-school students used e-cigarettes. The figure was triple the number of youngster users in 2013, as per the CDC.

The study found that among teens who reported to use e-cigarettes, 18% used to vaporize cannabis. According to the researchers, teens from high schools in the study were about 27 times as likely to use electronic cigarettes to vaporize cannabis as adults who use the devices.

Young male teens were found to use more e-cigarettes to vaporize cannabis than young females and adults.