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Nonsmokers who are exposed to second-hand smoke at home or work increase their heart disease risk by 25–30% and their lung cancer risk by 20–30%. Second-hand smoke has been estimated to cause 38,000 deaths per year, of which 3,400 are deaths from lung cancer in nonsmokers. [ 119 ]
In 2002, it was estimated that half of the drinking water was polluted with arsenic, exceeding levels of 10 micrograms per litre. [262] Bangladesh is crippled with one of the worst air qualities in the world, mostly concentrated in the densely populated urban areas, especially the capital Dhaka and its metropolitan area . [ 263 ]