Zimbabwe's local authorities and health experts have warned that the erection of ventilated pit latrines by the small number of beneficiaries of the country's urban renewal housing project could pose a serious health hazard. Government has encouraged the occupants of the 150 new houses hastily constructed after the controversial Operation Murambatsvina (Clean out Garbage), which affected hundreds of thousands of people last year, to build the toilets while they await the installation of formal ablution facilities.