In order to obtain reliable knowledge concerning the pollution situation and its effects the Mixed Commission, which is a body at political high level, has established a series of expert groups for studies of:

• local air pollution
  
  
  
• modelling long-range transboundary spread
  
  
  
• effects upon terrestrial ecosystems
  
  
  
• effects upon aquatic ecosystems
  
  
  
• effects upon marine ecosystems
  
  
  
• effects upon human health
  
  
  
• effects of oil spill effects of radioactivity