CHICAGO -- E-cigarettes have become an alternative to smoking tobacco and now high school students have found another way to use the electronic devices.
There is growing concern about the number of teens using e-cigarettes to get high.
A survey of high school students found more teens are using "vape" technology to smoke marijuana.
Parents and teachers are worried since it can make the drug more potent and since e-cigarettes mask the smell of what is being smoked it can make it more difficult to detect.
Survey: High school students using vaping technology to smoke pot