Hong Kong Air Pollutant Emission Inventory - Other Combustion

Sectoral Analysis for Other Combustion Sources

Emission from Other Combustion

Other combustion sector is one of the important sources of RSP and FSP emissions, accounting for 16% and 19% of their total emissions in 2018 respectively. Overall, the emissions of various pollutants from other combustion sources decreased by 34% to 93% from 2001 to 2018.

Major contributing sources in this sector are non-road mobile machinery (NRMMs), especially construction machinery, which accounted for 53%, 56% and 56% of RSP, FSP and NOx emissions from other combustion sources respectively in 2018. The emission trends from other combustion sources from 2010 to 2018 by and large followed the fuel consumption change in construction projects. To reduce the emissions from NRMMs, prescribed emission standards for newly approved NRMMs have been stipulated in the Air Pollution Control (Non-road Mobile Machinery) (Emission) Regulation since 1 June 2015.

The SO2 emissions from this sector have been reduced to a very low level since the implementation of the Air Pollution Control (Fuel Restriction) Regulation in October 2008, which tightened the cap on the sulphur content of diesel used in industrial and commercial sectors from 0.5% to 0.005%. Since January 2009, Euro V diesel (with sulphur content not exceeding 0.001%) has been imported for industrial and construction use.