We urgently need to develop scalable methods for removing carbon from the atmosphere. Although many engineers still question the economic feasibility of capturing carbon dioxide from the air, there are simply no alternatives. There are two reasons: on the one hand, society is acting too hesitantly on the climate crisis so that we will have to reverse the greenhouse gas emissions that will surpass our budgets. On the other hand, carbon capture is an indispensable part of a fossil-free circular economy. Neither can we recycle all carbon-containing products at the end of their life cycle, nor will we be able to base our entire economy on biomass. Ultimately, large amounts of carbon will be emitted into the atmosphere (let it be waste combustion or fuel use) and have to be captured to close cycles. We are currently engaged in the following projects: