Data are the new gold, or so we often hear. Stefan Lefever (Imec) has a different opinion: “Data should not be the new gold, but – like renewable energy – should be managed sustainably and with decentralised ownership with a view to innovation and the common good.” To prevent data from remaining the monopoly of the current tech giants, which would be detrimental to privacy, research security and innovation, we want to contribute to the development of common European data spaces, together with other European partners and in line with the European Data Strategy. Such data spaces will ensure that more data is available to scientists and the public sector in general, while remaining under the control of those who generate it. KU Leuven researchers are already contributing to this.