Should taking drugs be against the law? Two British politicians have restarted the debate over decriminalisation. But experts have been researching this question for decades.
Time to legalise drugs, says politician
Harsh penalties: In the UK, possessing Class A drugs can lead to a prison sentence of up to seven years. Glossary
Fermented - In fermentation, yeast breaks down sugar to make alcohol.
Green Party - A centre-left party largely focused on environmental politics. It formed part of a coalition government with the Social Democrats between 1998 and 2005.
Decriminalisation - To stop treating something as illegal or a criminal offence.
Addictive - So enjoyable that you do not want to stop.
Legitimate - Allowed by law.
Prosecuted - The start of legal proceedings that aim to prove that someone has committed a crime.