From 1993 to 2006 the poverty line has decreased by 22%. Zambia fell into poverty, especially after international copper prices declined in the 1970s. About 68% of Zambians live below the recognized national poverty line. If the Zambians dont have enough money they can not buy filters for themselves. Zambian people also cannot get jobs because there are no jobs available in Zambia because the business cannot sell products because people are poor.
Links:
-http://www.indexmundi.com/zambia/population_below_poverty_line.html
-http://en.wikipedia.org/wiki/Zambia