Report on a policy response to NOx emissions from aviation released by the European Commission

At the end of March 2009 a report, Lower NOx at Higher Altitudes - Policies to Reduce the Climate Impacts of Aviation NOx Emissions (2MB .pdf), completed in October 2008 by the consultancy CE Delft, was released by the European Commission (HT to AviationWatch).

This is an area where the science is still uncertain but is receiving considerable research attention.