Household air pollution has been estimated to be responsible for 3.2 million preventable deaths every year globally. With biomass exposure and environmental pollution linked to exacerbations of airways disease, this health impact disproportionately affects low and middle income countries. Puzzolo et al ( Lancet Resp Med 2024;12(4):281–293) undertook a systematic review and included 116 studies in the subsequent meta-analyses, to compare use of gaseous fuels in the domestic environment with more polluting fuels (wood/charcoal/kerosene) and cleaner fuels (electricity/solar) with no point of use pollution. Use of gas significantly decreased the risk of COPD (OR 0·37, 95%CI 0·23–0·60; p<0·0001), pneumonia (OR 0·54, 0·38–0·77; p=0·0008), deficits in lung function (OR 0·27, 0·17–0·44; p<0·0001), severe respiratory illness or death (OR 0·27, 0·11–0·63; p=0·0024) compared with more polluting fuels. Preterm births (OR 0·66, 0·45–0·97; p=0·033), and low birth weights were similarly reduced (OR 0

Industry uses market segmentation of products to attract and retain consumers from a variety of groups based on demographics, interests, behavioural factors and common needs. This approach is used across many commercial sectors selling a diverse range of commodities including cleaning, beauty, food, automobile and electronic products. Consumers may be attracted to goods based on a number of characteristics including price, packaging, advertising or ease of use. There may also be a perception among consumers that some products are ‘safer’ to use or consume, perhaps based on frequency of use, appearance, marketing and peer influencers.1 The tobacco industry has been adept at using market segmentation across its tobacco range, for example, evoking emotion and identity by differentiating cigars (tobacco wrapped in tobacco leaf, eg celebration, Winston Churchill), pipe tobacco (thicker tobacco strands, eg, concentration, Sherlock Holmes) and cigarettes (fine ground tobacco, eg, relaxation—m