Friday, 15 September 2006, 15:37 GMT 16:37 UK
The World Health Organization (WHO) has reversed a 30-year policy by endorsing the use of DDT for malaria control.
The chemical is sprayed inside houses to kill malaria-carrying mosquitoes.
DDT has been banned globally for every use except fighting disease because of its environmental impacts and fears for human health.
WHO says there is no health risk, and DDT should rank with bednets and drugs as a tool for combating malaria, which kills more than one million each year.
BBC
