Answer: slums

AnswerCrossword Clue
SLUMS

Jacob Riis concerns

SLUMS

Substandard urban housing

SLUMS

Inner city blights

SLUMS
Nearly a billion people live in them
SLUMS
Run-down urban areas
SLUMSUrban eyesores
SLUMSUrban problems
SLUMSDepressed areas
SLUMSRiis concern
SLUMSUrban-renewal candidates
SLUMSRookeries.
SLUMSSite of city housing project.
SLUMSSqualid districts of a city.
SLUMSCertain city streets.
SLUMSCity scars.
SLUMSItems for clearance.
SLUMSHousing problem.
SLUMSCertain residential areas.
SLUMSUrban eyesores.
SLUMSProblem for city planners.
SLUMSUrban evils.
SLUMSCivic problems.
SLUMSType of neighborhood.
SLUMSTarget of today.
SLUMSCertain city sections.
SLUMSCity areas.
SLUMSUrban blight
SLUMSBlighted areas
SLUMSWarrens
SLUMSThe shame of cities
SLUMSInner cities, often
SLUMSIn Britain they're called thieves' kitchens
SLUMSUrban renewal targets
SLUMSHousing problem
SLUMSNeglected neighborhoods
SLUMSAreas of urban decay
SLUMSUrban renewal areas
SLUMSJacob Riis setting
SLUMSPoor housing areas
SLUMSBlighted blocks