A stakeholder meeting on the climate impacts of transport emissions will take place in Brussels, Belgium, on 24 June 2010. Results from two European projects will be presented: The EC funded Integrated Project QUANTIFY (http://ip-quantify.eu ^[1]) quantified the impact of transport on the composition of the atmosphere and on climate. The Specific Support Action ATTICA (http://ssa-attica.eu ^[2]) produced an assessment report of the impact of the transport modes (aviation, shipping, land transport) on atmosphere and climate. ECATS researchers working on climate impact of aviation contributed to these processes and will give presentations at the meeting.