On a good day, all these factors can be found in one place, filling the air with a foul vapour that assaults the nostrils of the lucky wayfarer passing by. The unbearable pollution goes back some time now, maybe three or so years, but city authorities seem unconcerned as they go about their daily business.
The stench, which is almost a palpable miasma, must permeate the entire atmosphere above the city, contaminating meteorological conditions beyond even the stratosphere. A real and present danger to the pulmonary health of the human population of the city and its other mammalian denizens, its odorous vapour can only attract disease-bearing organisms that thrive in filth.