For some these are a necesary evil of the modern world. Something to be aware of
Filtered cigarettes are banned from many camping events. Why? Because too many smokers do not consider butts to be rubbish and dump them on the ground.
The fibre used to make the filters will never decompose and is not good for grazing animals.
A clever way around this problem is to make a drawstring pouch large enough to hide a plastic film canister in. What do you have? One portable ashtray!