![](https://nthumb.tpgimages.com/mid2_com_img/1339/25706/TOP24752742.jpg)
Hydrogen fuel cell, illustration. This is a clean and efficient power source. Hydrogen (red) is liberated from a natural source such as methanol or natural gases. It is then pumped into the cell, where the hydrogen nuclei are separated from their electrons (yellow). The electrons flow around a conducting loop as an electric current, which can be harnessed. The hydrogen nuclei pass through a membrane (centre) and then combine with the electrons and oxygen (blue) from the air to form steam, and water is the only waste product.
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TOP24752742
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達志影像
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RM
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