Initially when I noticed them for the 1st time a few years back I thought that might be something to do with getting high.
You might be right, but I ussually see them on the road as some one stoped and mended on the spot. Not a forensinc but seem they were dropped from a low height as they are not widely scattered(too much explanation).
I would guess if it were kids fooling around they would be a bit more secluded I guess. Also encounterd them on lanes too.
If you do want to do the forensics, CO2 cartridges are steel and usually threaded. NO2 are aluminium, and therefore lighter and non magnetic, also not usually threaded. I think.
Initially when I noticed them for the 1st time a few years back I thought that might be something to do with getting high.
You might be right, but I ussually see them on the road as some one stoped and mended on the spot. Not a forensinc but seem they were dropped from a low height as they are not widely scattered(too much explanation).
I would guess if it were kids fooling around they would be a bit more secluded I guess. Also encounterd them on lanes too.