1.water, sanitation and hygiene present a significant challenge over the coming 15 … Framework_WEB.PDF. WASH Climate Resilient Development- Technical.https://www.unicef.org/media/91266/file/UNICEF-Strategy-for-WASH-2016-2030.pdf
2. International Labour Office. occupational health / occupational safety / water quality / sanitation / hygiene .. https://www.ilo.org/wcmsp5/groups/public/—ed_dialogue/—sector/documents/publication/wcms_535058.pdf