Enhanced weathering utilises 'rock dust' for carbon capture

Companies globally are turning to enhanced weathering, spreading crushed rocks on farms to capture carbon dioxide from the atmosphere.  The crushed silicate rocks, such as volcanic basalt, are distributed onto fields, where they react with CO2 to form bicarbonate minerals, eventually washing into rivers and the ocean. The method shows promise in aiding carbon removal efforts, with projects underway on every continent except Antarctica. Companies including UNDO and InPlanet are scaling up operations. However, accurately measuring the carbon stored remains a challenge along with calculating emissions from rock transportation. Developing standardised measurement protocols is crucial to ensure reliable carbon removal estimates as enhanced weathering gains traction worldwide. (New Scientist)