Wooden knives that are three times sharper than steel ones could help cut down on energy usage and plastic cutlery waste, according to a report in NewScientist.
According to the report, Teng Li at the University of Maryland and his colleagues developed a hard wood material 23 times harder than raw wood. It can be carved to make knives three times sharper than standard steel knives.
In another example, nails made from hardened wood were lighter and more sustainable than steel nails, but equally good at holding together three layers of wooden boards that were each 5 mm wide.
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