On your way down to get coffee, instead of leaving the sugar packet wrapper that somebody dropped on the floor, you would stoop and pick it up, and place it in the trash. If by chance somebody left an empty aluminum soda can on the table, you might stash it in a plastic bag, to drop it off at the recycling center on your way home. When you stop at the shopping mall on your way home from work, you would have plenty of opportunity to pick up trash as you walk from store to store. And, by the time you returned home that evening, picking up the cereal box that blew out of the trash truck as it drove past your house would seem like second nature.