“The deadly tally broken up by diseases shows that chronic obstructive pulmonary disease (COPD) due to air pollution at 49% is responsible for close to half of deaths, followed by lung cancer deaths at 33 per cent, diabetes and ischaemic heart disease at 22 per cent each and stroke at 15 per cent. It is disturbing how COPD, lung cancer and ischaemic heart disease dominate the dubious tally,” it said.