Science & Research

Peer-reviewed evidence behind clean indoor air. Every product we make is grounded in published science — with full analysis of each study below.

Male Fertility
Air Pollution Causes DNA Changes in Sperm
Nobles, C. et al. — Human Reproduction — ESHRE 42nd Annual Meeting, London, July 2026
39 DNA changes in 1,220 men
Air pollution during the 3-month sperm production window causes measurable DNA changes. Key fertility gene GNAS affected. Ozone caused 35.5% hypomethylation in reproductive gene DGKG.
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Children’s Health
Air Pollution Stunts Children’s Lung Development
Gauderman, W.J. et al. — New England Journal of Medicine — 2004 & 2015
5× higher risk of low lung function at 18
Tracking 1,759 children over 8 years, children in the most polluted areas were nearly 5 times more likely to have clinically low lung function at age 18. Deficits persist into adulthood.
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Cognitive Performance
Clean Air Nearly Doubles Cognitive Performance Scores
Allen, J.G. et al. — Environmental Health Perspectives, 124(6) — Harvard T.H. Chan School of Public Health, 2016
101% higher cognitive scores
Workers in low-VOC, well-ventilated environments scored 101% higher on cognitive function tests. Biggest gains in crisis response, strategy, and information usage. 61% improvement at intermediate air quality.
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Asthma & Respiratory
PM2.5 Contributes to 58% of Asthma Cases Worldwide
GBD 2019 Risk Factors Collaborators — The Lancet, 396(10258) — WHO Global Burden of Disease, 2020
58% of asthma cases linked to PM2.5
The most comprehensive disease burden analysis ever conducted found PM2.5 contributes to 58% of asthma cases globally. In the UK, household air pollution is the primary exposure pathway. Early-life PM2.5 raises asthma risk by up to 29% per 10 µg/m³.
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Sleep Quality
Higher PM2.5 and NO2 Significantly Reduce Sleep Quality
Billings, M.E. et al. — Annals of the American Thoracic Society, 16(3) — University of Washington, 2019
60% higher odds of poor sleep
Analysing 1,863 adults across six cities, higher PM2.5 was associated with a 60% increase in odds of low sleep efficiency. NO2 increased sleep fragmentation odds by 50%. Effects found in healthy adults at levels below UK legal limits.
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Global Health Burden
Air Pollution: 9 Million Deaths Per Year — More Than AIDS, TB and Malaria Combined
Landrigan, P.J. et al. / Fuller, R. et al. — The Lancet & Lancet Planetary Health — 2017 & 2022
9 million deaths/year • $4.6T economic cost
The Lancet Commission on Pollution and Health — 40 scientists across 16 countries — found pollution causes 9 million premature deaths per year: 16% of all global deaths. Indoor air pollution causes 3.2 million annually.
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New research added as it is published — suggest a study: hello@cleanairkits.eu

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