The so-called urban disease refers to a series of social problems caused by the excessive concentration of population in big cities. It is mainly manifested in the blind expansion of urban planning and construction to the surrounding area, a large amount of cultivated land is occupied, and the contradiction between man and land is more acute. .
According to the above definition, the statement 'Lead to a decline in the city's economic strength' does not belong to the specific manifestation of urban disease.