Ethane emissions can lead to ozone pollution. Measurements at 49 sites show that long-declining atmospheric ethane concentrations started rising in 2010 in the Northern Hemisphere, largely due to greater oil and gas production in the USA.
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Hakola, H., Hellén, H. The return of ethane. Nature Geosci 9, 475–476 (2016). https://doi.org/10.1038/ngeo2736
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DOI: https://doi.org/10.1038/ngeo2736
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