Digging a safe latrine pit is more complex than you might think!<p><a href="http:&#x2F;&#x2F;www.who.int&#x2F;water_sanitation_health&#x2F;hygiene&#x2F;emergencies&#x2F;fs3_4.pdf" rel="nofollow">http:&#x2F;&#x2F;www.who.int&#x2F;water_sanitation_health&#x2F;hygiene&#x2F;emergenci...</a><p>Plus they have a limited lifetime; they fill up, and you need to dig a new one.