Gassed
Villagers benefit from a simple new biogas design
'Stick' to clean teeth
The much derided chewing stick has finally found a proponent
Self-shelter
Solar sense
Backpack to the rescue
Stripping device
Quite a saving
Effective alternative
Small pump, big help
Steering water
Nepalese villagers upgrade water wheels to generate power
Garlic guard
Rubber soles for crops
Scrap tyres buried underground could reduce irrigation costs
Driving out weeds
A motorised device to uproot weeds
Cooking made easy
Oil boom
Bullock power
Pitcher pure
Home remedy
Extremely light!
Turmeric harvester
Water from sun