Teens less likely to use pot in states where it's legal

BBC = Teenagers are less likely to use cannabis in places where the drug has been legalised, a new study suggests.

Researchers at Montana State University looked at health surveys of US high school pupils between 1993 and 2017.

While overall use of the drug among young people went up in the US, teen use declined by nearly 10% in states where recreational use was legalised.

Some 33 states have legalised medical cannabis, while 10 states have also legalised recreational use.

Cannabis use remains illegal in all states for people under the age of 18.