Shipboard system that uses limestone and seawater could cut CO₂ emissions by half

Shipboard system that uses limestone and seawater could cut CO₂ emissions by half

Scientists at USC and Caltech, in collaboration with startup company Calcarea, have developed a promising shipboard system that could remove up to half of carbon dioxide emitted from shipping vessels by converting it into an ocean-safe solution.

USC technology may reduce shipping emissions by half

Maritime shipping accounts for nearly 3% of global greenhouse gas emissions, but current solutions are expensive or impractical for long-distance voyages. (Photo/iStock) Share Science/Technology USC technology may reduce shipping emissions by half New research shows how a shipboard system using limestone and seawater could cut maritime CO2 emissions by 50%. June 25, 2025 By Nina Raffio Scientists at USC and Caltech, in collaboration with st…

USC Technology May Reduce Shipping Emissions by Half

New research shows how a shipboard system using limestone and seawater could cut maritime CO2 emissions by 50%.