A local variety of the nutrient-rich, blue-green algae known as spirulina could boost incomes for women in Chad who harvest the product as well as help fight nutrition, the United Nations Food and Agriculture Organization (FAO) has reported. The agency is running a $1.4 million project in which women are gathering and processing the product, known locally as dihé, from the shallow pools of water on the edges of Lake Chad where it forms at certain times of the year.