Digging a safe latrine pit is more complex than you might think! http://www.who.int/water_sanitation_health/hygiene/emergencies/fs3_4.pdf http://www.who.int/wa

Digging a safe latrine pit is more complex than you might think! http://www.who.int/water_sanitation_health/hygiene/emergencies/fs3_4.pdf http://www.who.int/water_sanitation_health/hygiene/emergenci... Plus they have a limited lifetime; they fill up, and you need to dig a new one.