Should we give up smartphones? New research has found a clear correlation between social media use and anxiety. Some think it is time to pull the plug on the social networks.
Social media blamed as anxiety soars
Long-term: Oxford's Professor John Gallacher will examine how 50,000 UK teenagers' mental health changes over 10 years in the full BrainWaves study. Glossary
Tobacco - A substance smoked in cigarettes. It contains nicotine, which is addictive.
Cigarettes - A thin tube of paper containing tobacco, which is then smoked.
Joe Camel - An advertising mascot for the RJ Reynolds Tobacco Company used between 1974 and 1997.
Dromedary - A one-humped camel.
Epidemic - A widespread disease or infection.
Anxiety - A feeling of unease or worry. It can be mild or very severe.
Meta - The new name of the company which owns Facebook and Instagram.
NHS - The National Health Service, the publicly funded healthcare system in the UK. The NHS was founded in 1948.
Indispensable - Something that you cannot do without.