A solar water sterilizer takes aim at rural…
This solar water sterilizer treats 10 liters of water in two…
This solar water sterilizer treats 10 liters of water in two…
Two-watt solar panels jut incongruously from thatched roofs in a rural Ethiopian village,…
Update 8/2/2011: The students raised $25,000, enough money to outfit one of…
Solar cookers solve real problems in health and conservation—they promote better…
Vaccines and other medical supplies travel to rural Kenyan communities on…