Researchers at Washington State University have developed a carbon-negative concrete that is almost as strong as traditional concrete.

The team infused cement with biochar, a type of charcoal made from organic waste, that had been treated with concrete wastewater.

The biochar could absorb up to 23% of its weight in carbon dioxide from the air while retaining a strength comparable to regular cement.

Cement production is responsible for around 8% of global carbon emissions, and the development could significantly reduce emissions. The research was published in Materials Letters.