Researchers from the University of Washington and Microsoft have developed a seaweed‑infused cement that cuts the global warming potential of concrete by approximately 21% compared to conventional cement, while maintaining its structural strength. Cement production accounts for about 10% of global CO₂ emissions, mostly due to fossil fuel–powered heating and calcination; by contrast, seaweed acts as a carbon sink during growth, offsetting emissions when used as a dried, powdered additive. Critically, the team leveraged machine learning models to accelerate formulation—testing just 24 initial mixes and homing in on an optimal blend within 28 days, a process that traditionally would have taken years.

Source: Environmental News Network