Industrial grade "hippy crack" cylinders have been found on the ground in public places across Dublin.
Abuse of nitrous oxide by young people and teenagers is common across many parts of the city. 'Silver bullets', small steel capsules that contain the gas, are often found in parks where the drug is being abused.
The gas is inhaled to give the user a short high which can result in hallucination. It is known to be dangerous and has resulted in deaths.
