1. DtM Example Challenges

2. 2 Example Design Challenges Water Filtration and Purification The $25 Bicycle Drip Irrigation Systems Biomass Gasification Hardware Reuse and Recycling Cholera Treatment Devices Human Power Generation Rural Community Radio Low-Infrastructure Computing Communication and Mobility Aids for the Handicapped

3. 3 Example Design Challenges Pico-Hydro Power Low-Cost Corrective Eyewear Portable Medical Devices Passive Cooling Systems Technology for Traditional Handicraft Micro-processing for Coffee, Cocoa Environmental Monitoring Emergency Relief Shelters Food Quality Testing Rural Solar-Thermal and Solar-Electric Tabletop Fabrication Systems