There will be exemptions for legitimate uses of nitrous oxide, for example in medical or catering industries. The gas is commonly used as a painkiller and for producing whipped cream in cooking.
Well, cannisters are the only real problem here. All the expert advise said the drug was a non-issue, however there are certainly a lot of cannisters being left all over the place, creating a visible problem. Criminalising it probably won’t do anything about the visible problem, it will just incur costs and make otherwise law abiding citizens into criminals.
@TWeaK @RaivoKulli B12 consumption causing spinal cord degeneration is an issue.
Also N2O is a greenhouse gas, and supports combustion more effectively than pure oxygen, not very bad in small quantities and controlle,d spaces.