Electric cars powered by green electricity or renewable hydrogen will make tomorrow’s transportation more climate-friendly. Aircraft and ships, however, are sure to run on hydrocarbon fuels for some time yet. A sustainable way of producing these fuels is to combine green hydrogen with carbon dioxide (CO2). The Centre for Solar Energy and Hydrogen Research Baden-Württemberg (ZSW) has developed a more efficient and more affordable process to capture CO2 from the atmosphere for use as a feedstock. Rather than relying exclusively on electricity for power, the trick is to use the waste heat produced in other steps of this process to help cover its energy demands. Scientists have been running successful trials with this new process since April 2019 at a demo plant in Stuttgart. This research effort is part of the CORAL project, an acronym made up of the German words for CO2 as an airborne resource. The Federal Ministry of Education and Research is supporting CORAL with a €755,000 grant.