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*[[Solution of the week 3|Solution 3: Tried and true — treating water with chlorine]]
*[[Solution of the week 4|Solution 4: Baptist drilling - — affordable boreholes made by drilling clubs]] *[[Solution of the week 5|Solution 5: Clean water — it's right above your head]] *[[Solution of the week 6|Solution 6: Extremely affordable water filters]] *[[Solution of the week 7|Solution 7: Why water pumps should be extremely repairable]] *[[Solution of the week 8|Solution 8: Constructing low-cost water tanks with ferrocement]] *[[Solution of the week 9|Solution 9: The Rope Pump]] *[[Solution of the week 10|Solution 10: Drilling boreholes in the kitchen, the story of Samuel and Hermelinda]] *[[Solution of the week 11|Solution 11: Drilling boreholes the Bolivian way - the EMAS method]] *[[Solution of the week 12|Solution 12: Hydraulic rams - making water run uphill]] *[[Solution of the week 13|Solution 13: UNICEF goes manual drilling]]
