I live right next to one of the widest parts of the Charles River (Waltham) and since I don't own a dog I often pick up litter during my walks along the river (

I live right next to one of the widest parts of the Charles River (Waltham) and since I don't own a dog I often pick up litter during my walks along the river (this behavior was encouraged by my brother early in my life... I'm not really a super environmentalist). The reason I mention the dog is I have seen people litter (usually throwing a cigarette, can, or candy wrapper) and than the next minute are picking up their dog's shit. Irony at its best.