A villager of Zuoba Village, Qamdo County, Qamdo Prefecture of southwest China's Tibet Autonomous Region uses biogas stove, March 18, 2009. [Xinhua photo]
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![A villager of Zuoba Village, Qamdo County, Qamdo Prefecture of southwest China's Tibet Autonomous Region uses biogas stove, March 18, 2009. [Xinhua photo]](http://images.china.cn/attachement/jpg/site1007/20090323/001109b42f730b31369345.jpg "A villager of Zuoba Village, Qamdo County, Qamdo Prefecture of southwest China's Tibet Autonomous Region uses biogas stove, March 18, 2009. [Xinhua photo]")