We send around 330,000 tonnes of used plastics to landfill every year. Critical are out to change this. They make table and bench tops, partitions and other feature materials for building from plastic waste. Upcycling rubbish into beautiful, low carbon and endlessly recyclable materials. Co-founder and CEO Rui Peng joins Simon Pound to talk the company's journey, making treasure from trash, and overcoming everything the world can throw at them.

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