A thought... If there are parallel dimensions and we one day master their interconnected nature (via black holes or other unknown means), might we designate one or several of these parallel dimensions as garbage dimensions? We could ship all our garbage into a sister dimension's Universe, where we would never have to worry about it again. Following this logic, there may be 'criminal' sister dimensions, where we send all our criminals (if criminals still exist) to live in a Universe prison we may call the Australia Universe. If we were especially cruel, we might send the criminals to the garbage Universe, just to be extra mean. hahaha that makes me laugh.