I have found a broken lead motorbike battery in a watery ditch near the farm of my brother. When you have fields and see the shit people throw on the land - just because its cheaper then garbage-dump. Only socialized garbage dispossal works. Its goto be cheap, instant, everywhere- else..
Biggest pigs are construction companys (painters) and restaurants (had somebody dump a truck-load of old kepab-meat). You have no recourse.
Also highly problematic are plants from gardens. People buy exotic plants, that grow beyond all excpectations, trim them and throw the "compost heap" trash into the forrest. Where it takes root again and things go wild.
Once its reported, the bill to clean that up goes to the landowner.
Also fun - new building material dumps - stryofoam and brick mixed- dumped in the wilderness and if found by officals, the landowner goto dig it all up and disposse it. Its incredibble how fewfarmers murder people.