Effective public policies and programmes to improve sanitation require accurate and up-to-date information on sanitation facilities, sanitation and hygiene practices and waste-water discharge.
47. 为了制定有效的公共政策和方案来改善环境卫生，有必要准确了解有关环卫设施、环境卫生和清洁卫生做法以及废水排放的最新情况。