The copper wire inside the wire will rust in the water. Is there any harmful substance?
Green is rusty, is the main component of copper sulfate, a highly toxic, do you have anything you have bronze, a little water, over a period of time can be seen in the water interface part of the green material that is copper rust
Or you soak the copper wire in the water, and some of it is out of the air, and it gets rusty after a long time
Copper will rust, and copper will react with oxygen to form copper oxide
