Researchers in Spain have mixed paper industry waste with ceramic material used in the construction industry and created a brick that has low thermal conductivity and so is a good insulator. 

What’s the catch? Its mechanical resistance still requires improvement. 

The scientists collected cellulous waste from a paper factory (recycled) along with sludge from the purification of its waste water. In their laboratory they then mixed this material with clay used in construction and passed the mixture through a pressure and extrusion machine to obtain bricks.

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