Gas cooking is a predominant source of household air pollution It is now scientific consensus that household air pollution can increase the risk for numerous noncommunicable diseases, including stroke, ischemic heart disease, chronic obstructive pulmonary disease (COPD) and lung cancer. The World Health Organization (WHO) estimates that in 2019, household air pollution accounted for the loss of 86 million healthy life years, and that annually, 3.2 million deaths can be attributed to air pollutants in the home environment. A significant source of household air pollution, second only to cigarette smoking, is cooking.