The Environment Bureau (ENB) released the first “Clean Air Plan for Hong Kong” in March 2013 which sets out in detail the various measures to tackle air pollution from power plants, land and sea transport, and non-road mobile machinery and to strengthen collaboration with Guangdong to deal with regional pollution. “Clean Air Plan for Hong Kong (2013-2017 Progress Report)” was published in June 2017 which gave an account on its implementation and achievements. ENB announced the “Clean Air Plan for Hong Kong 2035” in June 2021 setting out the long-term goals and strategies to further enhance the air quality with a view to leading Hong Kong to become a liveable city with air quality on par with major international cities by 2035.