JOHANNESBURG - Unicef says about 70 percent of urban residents in Sub Saharan Africa live in informal settlements.
The organisation says the region is the worst performing when it comes to urban housing.
It says this has a negative impact on children's development, health and psychology.
Farai Tunhuma from Unicef said 33 percent of the population has access to improved sanitation.
She said more investment into solving the problems caused by rapid urbanisation is needed.
Tunhuma said children living in secondary cities are not more likely to be able to access basic services.