What are they on?
Dutch tobacco ban means cafe smokers can only light up pure cannabis cigarettes - Telegraph
Smoking tobacco in restaurants and cafes across Holland is now illegal, but customers are still allowed to light up pure cannabis cigarettes.
"In other countries they look to see whether you have marijuana in your cigarette, here they'll look to see if you've got cigarette in your marijuana."
The Food and Consumer Product Safety Authority, which is responsible for enforcing the ban, said it had trained around 200 inspectors.
A spokesman said: "They can tell the difference between a mix or a pure joint from its smell and appearance."
The Dutch health minister, Ab Klink, said he hoped the law would help to rid the country of cannabis-induced idleness.