We make it a habit, and I do think it's worth mentioning. Litter is a result of the actions of individuals so it follows logically that its reversal can similarly be affected by the collective actions of individuals.
I am less swayed by the habitat argument. I lean toward picking it up if it doesn't belong there. If the theoretical inhabitant ends up as meal, that's to the benefit of the predator.
I am less swayed by the habitat argument. I lean toward picking it up if it doesn't belong there. If the theoretical inhabitant ends up as meal, that's to the benefit of the predator.