Not all of them. We have a young Zambian relative whose teeth are in terrible shape from lack of care. Pretty much everyone drinks poorly filtered and untreated well water. There are no municipal water systems. Don't get the idea that this is a good thing. Aquifers can get polluted.
Not all of them. We have a young Zambian relative whose teeth are in terrible shape from lack of care. Pretty much everyone drinks poorly filtered and untreated well water. There are no municipal water systems. Don't get the idea that this is a good thing. Aquifers can get polluted.