Jim,
Concerning the lack of sanitation at some Haiti evacuation camps: Porta-john [chemical toilets] are nice, but must be pumped out, cleaned and refilled regularly in order to remain usable. A simple solution I have used on the farm is to cut out the bottom of the john’s holding tank. Then we dig a hole and position the outhouse over the hole. As it is used, we occasionally throw a little lime or wood ash into the hole to control smell and bugs. The outhouse is on skids and is easy to move by hand, so when the hole is half full, we pull the john aside, dig a new hole and use the dirt to refill the “used” hole. When we have repositioned the outhouse over the new hole, we heap the remaining dirt around the outside edges of the building for more smell and insect control and to keep out ground water. Thus we have an always ready, clean and private facility for when the need arises.
I suggest that readers call their local porta-john rental companies. The suppliers in my area often have ones in need of slight repair available for purchase, at low cost. A non-chemical using, easy to move and clean outhouse would make a very nice, and most helpful, addition to