1. https://www.iea.org/energy-system/carbon-capture-utilisation-and-storage/direct-air-capture.
2. https://www.nationalgrid.com/stories/energy-explained/carbon-capture-technology-and-how-it-works.
3. https://www.cnbc.com/2021/01/31/carbon-capture-technology.html.
4. https://carbonengineering.com/our-technology/.
5. https://climeworks.com/technology/direct-air-capture.