Science, Maths & Technology
What can you do with leftover coffee grounds?
...study sessions. These days, the words “coffee” and “fuel” are half-jokingly synonymous. More than 9m tonnes of the bean are produced annually around the world and, once we brew it, an awful lot of waste is created. The vast majority ends up in landfill. [Coffee beans] There's gold in them there beans. Or polyhydroxyalkanoates, at least. Researchers in South Korea,...