Mining the Atmosphere, a new Empa research initiative, aims at capturing excess CO₂ from the atmosphere and storing it in building materials such as concrete. Empa researchers have now calculated the potential of this approach for the first time: Five to ten billion tons of carbon could be used annually as concrete aggregates – well enough to permanently store the current excess CO₂ within 100 years after the energy transition and thus to bring atmospheric CO2 back to climate-friendly levels.
