Agroforestry and arborloos

In a letter to The Economist (28 July 2012) Tony Simons, Director General of the World Agroforestry Centre in Nairobi, writes that, to reduce hunger and promote food security in the Sahel, agroforestry is the way forward. As he notes, “Trees provide not only ecological resilience but also cash income, energy, environmental services, fodder for animals and nutritious fruits”. Not a mention of arborloos. When will agriculture catch up with sanitation?