CAPTION: The biogas unit turns animal waste into gas, which is then piped directly to the kitchen for household use. The unit brings down Hue’s household’s reliance on fuel while also reducing pressure on timber sources in the local area. Although only ten units have been installed so far in Huy Tuong, they have been successful in raising awareness of this alternative source of energy. LOCATION: Huy Tuong, Son La Province, Vietnam. INDIVIDUAL(S) PHOTOGRAPHED: Lo Thi Hue.