"The California Redevelopment Act was enacted in 1945 to address problems of urban blight." (Evans v. City of San Jose (2005) 128 Cal.App.4th 1123, 1131.) "Redevelopment agencies are authorized to combat blight using three extraordinary powers--the diversion of property taxes that otherwise would have gone to the state or other government entities; the use of public funds to subsidize private enterprise; and the power of eminent domain." (Neilson v. City of California City (2007) 146 Cal.App.4th 633, 642.) "A finding that a project area is blighted is the absolute prerequisite for redevelopment." (Evans, supra, 128 Cal.App.4th at p. 1146, citing Sweetwater Valley Civic Assn. v. City of National City (1976) 18 Cal.3d 270, 277.) "The physical and economic conditions demonstrating the existence of blight are set forth in sections 33030 and 33031." (County of Riverside v. City of Murrieta (1998) 65 Cal.App.4th 616, 624.) "In summary, an area is blighted, and hence eligible for redevelopment, if it is predominantly urban and if it is adversely affected by economic and physical conditions too serious to be cured by private or governmental enterprise, thus necessitating redevelopment." (Id. at pp. 624-625.) "This required finding of blight is subject to judicial review in a validation action , and if there is insufficient evidence that the area is indeed blighted, the court must issue a judgment invalidating the redevelopment plan." (Boelts v. City of Lake Forest (2005) 127 Cal.App.4th 116, 120.)