Total emissions of major pollutants 2017 117.1 105.5 904.4 22.1 147.3 7.8 1,304.16 2018 131.4 116.0 857.2 22.6 178.7 7.2 1,313.13 2019 140.2 103.2 767.1 23.5 159.7 1.1 1,194.78 using natural gas were built in the reporting period, and four coal- and diesel-fired boiler facilities were decommissioned as sources of nitrogen and sulphur dioxides, particulate matter and soot.