It was World Toilet Day on the 19th of November, and we speak to Lucy Stevens, the Urban Services Expert at the UK-based NGO Practical Action, about the organisation's use of a variety of different technologies, as appropriate to each community, to help improve sanitation and health around the world.

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Tags:  practical action,  world toilet day,  sanitation,  health,  hygiene,  developing countries,  urban poverty,  rural,  toilets,  clean energy