(x – 22,189 tonnes, 44 per cent in or near areas of dense population (2) SO 2 – 62,818 tonnes, 20 per cent in or near areas of dense population (3) Particulate matter (PM 10 ) – 566 tonnes, 34 per cent in or near areas of dense population (4) Lead (Pb) – Emera does not consider lead emissions to be material to its operations.