Context: Apart from residences for upper and middle class households, sanitation is insufficient in most residential areas. Private flush toilets are too expensive for virtually all residents in townships due to their water consumption and installation cost. As a result, access to improved sanitation has not increased much since independence: In Namibia's rural areas 13% of the population had more than basic sanitation, up from 8% in 1990. Many of Namibia's inhabitants have to resort to "flying toilets", plastic bags to defecate which after use are flung into the bush. The use of open areas close to residential land to urinate and defecate is very common and has been identified as a major health hazard.

Question: Most residential areas are insufficient in what area of Namibia?
Answer: sanitation

Question: Besides installation cost, why are private flush toilets too expensive for most residents in Namibia?
Answer: water consumption

Question: What do Namibian's use as a toilet?
Answer: flying toilets

Question: Where do flying toilets end up after use?
Answer: bush

Question: Urinating and defecating in public has been identified as what?
Answer: major health hazard

Question: In what African country is sanitation sufficient for most residential areas?
Answer: Unanswerable

Question: In what African country are private flush toilets reasonably priced?
Answer: Unanswerable

Question: In what year did Namibia's rural areas have 13% of the population with more than basic sanitation?
Answer: Unanswerable

Question: In what African country is water plentiful?
Answer: Unanswerable