Human exposure to indoor air pollution in Ethiopian households.

Heliyon · 2022 · PMC9674910 · PMID 36411936

Europe PMC DOI

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a clear trendno p-value reported

There is a clear trend that the use of household energy sources from either biomass, natural gas, or electricity for cooking and heating is linked to IAP.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.