(b) “Slum area” means an area within the corporate limits of the City, in which area there is a predominance of buildings or improvements whether residential or non- residential, which by reason of dilapidation, deterioration, age, or obsolescence, substantial vacancy of existing structures, inadequate provision for ventilation, light, air, sanitation or open spaces, high density of population and overcrowding, or the existence of conditions which endanger life or property, by fire and other causes, or any combination of such factors, is conducive to ill health, transmission of disease, infant mortality, juvenile delinquency or crime and is detrimental to the public health, safety, morals or welfare.