Carbon-negative decking could lock up CO2 equivalent to taking 50,000 cars off the road

A man constructing a garden decking area using planks made of a composite materia

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New material stores more carbon dioxide than is released during its lifecycle and is 18% cheaper

One the first composite materials whose production actually cuts carbon dioxide emissions over its life cycle has been created by researchers at Pacific Northwest National Laboratory (PNNL), US. The work was presented at the spring meeting of the American Chemical Society on 17 March.

Decking boards made from wood–plastic composite, instead of lumber, are a popular option since they have a longer lifespan. Usually, such composite materials consist of a blend of wood chips or sawdust and plastic like HDPE.