Easy to say magily but seems harder to enforce apparently as for eg dog fouling - there are signs for penalites for doing so but policing it is another as seemingly same with litter - think it comes down to the usual money of employing such enforcers - i dont know
I'd really like to know how foreign lands can keep their streets so clean & we cant - there must be something??
But yeh its a case of watch were you tread here.