London buses could be powered by discarded coffee granules in the future under a new project which converts them into fuel. Londoners typically drink over 20 million cups of coffee a day collectively, leading to lots of wasted excess granules. This amounts to 200,000 tonnes of grounds that are produced by the capital alone each year. Arthur Kay, the founder of clean energy company Bio Bean, noted that the excess beans were high in calories and typically just chucked away. These calories have ...
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