urban decay
      — also known as urban rot and urban blight —
 
      is the process whereby a previously functioning city, or part of a city, 
      falls into disrepair and decrepitude.
      wikipedia 2017
    
      — also known as urban rot and urban blight —
 
      is the process whereby a previously functioning city, or part of a city, 
      falls into disrepair and decrepitude.
      wikipedia 2017