The cars that run on lots of coffee | Letters

It’s good to see that Cambridge is catching up with County Durham (Recycling waste into BBQ biofuel, 15 February).

Martin Bacon of Teesdale Conservation Volunteers, based in Barnard Castle, produced his first coffee-powered car in 2010 in conjunction with a BBC TV science programme, Bang Goes the Theory. It was driven from London to Manchester to launch a new series.

The next year he built another, which holds Guinness speed records, and in 2013 a third model built for the Co-op to celebrate fair trade broke distance records in exceeding 1,500 miles for a promotional trip.

All ran on coffee grounds converted into pellets.
Phil Hunt
Teesdale Conservation Volunteers, Deepdale, Barnard Castle, County Durham

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