1. Environmental Protection Department Cleaning the Air at Street Level, the Government of the Hong Kong Special Administrative Region. Clean the Air at Street Level. 2021. Available: https://www.epd.gov.hk/epd/english/environmentinhk/air/prob_solutions/cleaning_air_atroad.html, last accessed: 10 December 2021.
2. Van Audenhove F-J. The Future of Urban Mobility 2.0. 2014. Available: https://www.adlittle.com/en/insights/viewpoints/future-urban-mobility-20-full-study, last accessed: 10 December 2021.
3. Environment Bureau, the Government of the Hong Kong Special Administrative Region. Hong Kong’s Climate Action Plan 2030+. 2017. Available: https://www.enb.gov.hk/sites/default/files/pdf/ClimateActionPlanEng.pdf, last accessed: 10 December 2021.
4. Environmental Protection Department, the Government of the Hong Kong Special Administrative Region. Greenhouse Gas Emissions in Hong Kong by Sector. 2021. Available: https://www.climateready.gov.hk/files/pdf/Greenhouse%20Gas%20Emissions%20in%20Hong%20Kong%20by%20Sector.pdf, last accessed: 10 December 2021.
5. Environmental Protection Department, the Government of the Hong Kong Special Administrative Region. Hong Kong’s Air Quality Objectives. 2021. https://www.epd.gov.hk/epd/english/environmentinhk/air/air_quality_objectives/air_quality_objectives.html, last accessed: 10 December 2021.