There was a lot less things to litter with, things then not being overpackaged. Many things, such as bottles, were returnable, others usable for some othe purpose or collectable by the rag & bone man for some recompence. You couldn't afford tpo throw away things that might have some value. I expect tobacco ash was still strewn around the place, but this wouldn't show on photos, and there was one thing that was littered not directly from humans, horse dung , amd this was probably quickly collected for peoples gardens