Carbon dioxide (CO₂) is naturally removed from the air when it reacts with certain types of rock. We can accelerate this process by crushing suitable rocks and spreading them over agricultural fields. This simple method, known as “enhanced rock weathering”, could vastly increase the rate of CO₂ removal from the atmosphere.
Modelling studies suggest billions of tonnes of CO₂ might be removed annually if crushed rocks were applied to croplands globally. With current energy-related emissions at 37 billion tonnes a year, this means enhanced weathering could contribute in a big way to reaching net zero emissions. A new industry is rapidly emerging to do just that.
