Video: Small Business

Pee-powered cell phone points to 'smart toilet' technology (2:32) 

Aug. 13 - Does the call of nature hold the answer to a new form of renewable energy? Scientists in the UK are confident that it does. With backing from both the British government and the Bill and Melinda Gates Foundation, the researchers have developed a method for charging mobile phones with human urine. Matthew Stock reports. ( Transcript )

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