A clever recycling dog is helping clear the streets of litter by collecting hundreds of plastic bottles during his daily walks.Scruff, a 13-year-old border collie, has been amazing local residents who have dubbed him the 'eco dog' as he does his bit for the environment in Nuneaton, Warks.The intelligent pooch loves nothing more than picking up plastic bottles during a walk and his owners soon realised they could turn his playful antics into a positive.SWNS