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This prototype bicycle helmet will protect your head with a biodegradable and renewable alternative to hazardous Styrofoam. The shock-absorbing foam material inside was developed at KTH Royal Institute of Technology, and it is one of the key features of an entirely wood-sourced helmet. Credit: Cellutech

We may soon be saying goodbye to polystyrene, the petroleum-based material that is used to make Styrofoam. In what looks like an ordinary bicycle helmet, designers have replaced Styrofoam with a new shock-absorbing material made with renewable and biodegradable wood-based material.

Researcher Lars Wågberg, a professor in Fibre Technology at Stockholm’s KTH Royal Institute of Technology, says the wood-based foam material Cellufoam offers comparable properties to Styrofoam.

The helmet was pr...