摘要：Norway has a well-established legal system and advanced environmental science and technology in environmental protection.In 2007,the country introduced a tax on the emissions of NOx(nitrogen oxide)in order to control the emission,and it has achieved remarkable result in reducing NOx emission afterwards with the support of NOx Fund and realized the emission reduction target for 2020 under Gothenburg Protocol in 2016 in advance.The NOx Fund has achieved a balance between emission reduction and the development of new technology,which is worth learning from.