Concrete causes 7% of global CO2 emissions. This is an environmental and economic threat as CO2 prices have grown 6X since 2017. Concrete producers (e.g. Holcim, Heidelberg, CEMEX) want to achieve zero emissions by 2050. Neustark enables zero emissions concrete by capturing concrete production emissions from the atmosphere and permanently converting them to limestone. This climate positive limestone replaces cement and sand which are major cost drivers for concrete production.