NOx is emitted from the combustion of oil, gas and bio-fuel. The emissions may be reduced by improving the combustion processes and through a change-over to fuels which serve to reduce emissions, or by installing cleansing equipment.
The Gothenburg Protocol
Through the Gothenburg Protocol Norway has committed itself to reducing its total annual emissions of NOx up to a maximum of 156,000 tonnes.
The Environmental Agreement on NOx
The Environmental Agreement 2008-2010 reduced Norway's emissions by 18,000 tonnes of NOx. The new Environmental Agreement on NOx for the period 2011-2017 shall further reduce Norway's NOx emissions by 16,000 tonnes, and maintain the effect of already achieved emission reductions throughout the entire period.
Emission reductions as a result of the Agreements are first and foremost from the shipping and fishing fleet, but also measures in the mainland industry and offshore petroleum industry. Ship owners may reduce emissions by installing cleansing equipment, upgrading the ship engine or by switching from diesel to gas.