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Visitors view a bicycle with power supply from hydrogen fuel cells during the China International Energy Saving, Emission Reduction and New Energy Science and Technology Expo at the Beijing Exhibition Center in Beijing, capital of China, March 22, 2009. [Chen Xiaogen/Xinhua]
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![Visitors view a bicycle with power supply from hydrogen fuel cells during the China International Energy Saving, Emission Reduction and New Energy Science and Technology Expo at the Beijing Exhibition Center in Beijing, capital of China, March 22, 2009. [Chen Xiaogen/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20090324/000cf1a48b7f0b3278a608.jpg "Visitors view a bicycle with power supply from hydrogen fuel cells during the China International Energy Saving, Emission Reduction and New Energy Science and Technology Expo at the Beijing Exhibition Center in Beijing, capital of China, March 22, 2009. [Chen Xiaogen/Xinhua]")
