Litter 'nightmare' as street cleanliness worst on record / Gamifying litter cleanup: How a new initiative in Ontario is turning trash into cash / Yes groups to host litter picking events across Scotland / 'I've seen people stop their cars to pick up litter': how one city cleaned up its streets / How a Maryland landscaper turned street litter into a message of love / How population density and location shape litter levels facing UK communities / From cat litter to incontinence pads: UK shoppers on how 'porch pirates' got caught out / Meet the man who busks from inside a litter bin / 'Litter picking is my way of earning benefits' / Fundraiser for girl's dream of 'litter-free world'