Coal-burning mostly induces mild endemic fluorosis in Zunyi,but remarkably severer in some wards. All are mainly caused by massive intake of the fluoride that comes from the fluoride pollution of coal-burning in the opened furnace and chilli dried Kang.

• 遵义市燃煤污染型地方性氟中毒病情以轻度为主,但部分病区县流行强度较显著,主要通过室内敞炉灶燃煤导致煤烟氟污染室内空气和烘炕的辣椒而摄入大量氟所致。