;2014;Change in per cent;Change in per cent; 2013 - 2014;1990 - 2014; Lead (kg);5650;2.1;-97.0; Cadmium (kg);413;-13.6;-72.5; Mercury (kg);351;-11.6;-76.2; Arsenic (kg);1237;-9.1;-64.5; Chromium (kg);3038;1.4;-73.0; Copper (kg);28182;-1.3;17.5; Particulates - PM10 (tonnes);35231;-8.2;-30.7; PAH-4 (kg);7728;-7.6;-78.8; Dioxins (g);17;-19.1;-85.5;