MODEL RELEASED. Collecting salt rations. Hands pouring a ration of salt into a pot at the Breidjiing Refugee Camp in Chad. The camp is home to around 30,000 refugees from Darfur in Sudan and food aid has been provided by the United Nations World Food Programme (WFP). Salt (sodium chloride) is provided to refugees as it is a natural source of essential minerals such as sodium, magnesium and iodine. Photographed in 2004.