Alithic, a spinoff from the University of Wisconsin-Madison, has developed a process that turns coal ash and excess carbon dioxide into a durable, environmentally friendly building material called supplementary cementitious material (SCM). This innovative material can replace traditional Portland cement, helping to reduce greenhouse gas emissions. By pulling carbon dioxide from the air and mixing it with industrial wastes, Alithic's process creates a carbon-negative product that has the potential to transform waste streams into profitable solutions for the construction industry.