Confidence votes 3.2K. Dog poop (as well as human waste) contains dangerous pathogens that can cause sickness and disease. So dog poop left on the footpath can be dangerous to the environment of children and even other dogs.Dog poop that decomposes naturally can release nutrients into the soil that are beneficial to nature. It may also release carbon dioxide and methane which add to the greenhouse gas layer.onfidence votes 3.2K. Dog poop (as well as human waste) contains dangerous pathogens that can cause sickness and disease. So dog poop left on the footpath can be dangerous to the environment of children and even other dogs.