| WP1 | Data for chemical compounds and emission of precursors | |
| WP2 | Model development | |
| WP3 | The role of NOx distribution and changes | |
| WP4 | Clouds and contrails | |
| WP5 | Stratospheric particles and transport | |
| WP6 | Impact on RF | |
| WP7 | Impact by supersonic aircraft | |
| WP8 | Options for reducing the impact |