On June 1st and 2nd the annual meeting of MOMENTUM took place in Scheveningen (NL). A consortium in which apart from basic research into effects of model and real-life particles, also solution sets are being explored. Nanoconsult is strongly involved in the solution set of Safe by (Bio)degradation and has contributed to the first draft paper on this issue. Meanwhile we noted that our paper written by Wright and Borm (2022) was discussed at Inhaled Particles in Manchester (May 2023) and quoted as the exposure gap.