Location: Sydney, Australia. Found it during bushcare.
The brass barb fitting and the powdery filling suggest some sort of kiln burner to me, but the dark green paint on the outside of the tube looks rather ordinary and not like it has been through high temperatures.
The soft, powdery cemetitious filling has a copper-green tint. Only one end has a hole.
If it were not for the brass barb and coppery fill colour I would assume this is just a bit of structural steel from someone's carport (or similar) that has filled with cement and now been cut to pieces for disposal. But a carport with a barb fitting? WTH?
We find all sorts of garbage in this bushland because it's sandwiched in suburbia. Traditionally it was a dumping ground (mattresses, furniture, asbestos, whole cars) and today still people use it illegally as a dump (mainly building materials and soil). Lots of random materials get deposited by or uncovered by stormwater runoff & floods too. There is no limit to the craziness of what you find here.
sorry, making you feell uncomfortable was not my intention.
i guess thats the correct way. just imagine there would actually be illegal chemicals in it and your fingerprints are on it now :o) not mentioning it to them could even create a problem then.
on the pictures it looks rather blueish to me not greenish and the other guy mentioning meth reminded me of the blue color somewhere in breaking bad, so the idea that the pipe had been used for processing drugs got stuck in my mind 🤷 but my knowledge in this topic is rather limited to half forgotten school knowledge, common sense and movie bullshit...
guess its nothing, but telling police about it is the right thing anyway. maybe donate them a donut or pizza if its nothing 😉