On May 28th, Lorie Hamelin presented some Cambioscop work on the biopumps (RO4) at the EUBCE 2019 conference in Lisbon. Can we store carbon on French soils, where should we do it and what biomass yield would be needed to ensure a minimal carbon storage? This is what can be found in her presentation, but there is still work ahead to complete RO4. The LISBP PhD student Zhou Shen has been involved in this work, as well as Shivesh Karan of Cambioscop and Uffe Jorgensen, Jorgen Olesen and Ji Chen of Aarhus University.