BTW, to me the word trash, junk and garbage are not totally interchangeable.
In my mind trash is more like papers, dry stuff. Like the things you put in a waste paper basket at work. I wouldn't feel like I would have to wear rubber gloves to go through household or office trash.
Junk are things that are now useless or don't work right anymore. It's junk when it's not worth keeping.
However, Americans have the term "junk drawer". That's the drawer that you never get around to organizing, and is filled with odds and ends, mostly small items. The items are still useful, it's just really disordered. Do you have a particular name for that sort of thing?
Garbage to me is more messy. Wet and/or dirty. It's what accumulates in your kitchen garbage can, and is taken to the dump to molder and fester and attract rats and sea gulls.
When you rake and trim your garden or lawn, that's yard waste.