NILU is an independent research institute founded in 1969. NILU`s environmental building on Kjeller, the outskirt of Lillestrøm and Oslo, became the permanent headquarter in 1994. The institute conducts environmental research with emphasis on the sources of airborne pollution, atmospheric transport, transformation and deposition and is also involved in the assessment of the effects of pollution on ecosystems, human health and materials. A main priority for NILU is to provide scientific facts on the quantitative relationships between these factors, and at the same time make the results available in user friendly manners for decision-makers.