From the case:
Nitrous oxide cannister
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https://commons.wikimedia.org/wiki/File:SparkwhipNitrousChargerBack.JPG
EvilHom3r, CC0, via Wikimedia Commons.
Case Discussion
The typical appearance of a nitrous oxide canister.
The recreational use of such canisters results in them, like with other litter, potentially being observed in public environments.
Nitrous oxide use can result in neurotoxicity.
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