an hourly basis, that are a leading component of smog. It began regular monitoring of PM2.5 levels, which measure 2.5 micrometres in diameter or less, at three stations since 2005, but the data were never publicised. Other Work The Department also works with local organisations for advocacy work, including with the Geography Society of PLK Vicwood KT Chong Sixth Form College between 2008 and 2009. Environmental Resource Centre Fanling Environmental Resource Centre Tsuen Wan Environmental Resource Centre Wan Chai Environmental Resource Centre See also Air pollution in Hong Kong References External links Hong Kong government departments and agencies Nature conservation in Hong Kong Ministries established in 1986 Environmental agencies of country subdivisions Hong Kong 1986 establishments in Hong Kong