Formic acid exerts a significant influence on atmospheric chemistry and rainwater acidity. Satellite observations and model simulations suggest that terrestrial vegetation accounts for around 90% of the formic acid produced annually.
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Millet, D. Natural atmospheric acidity. Nature Geosci 5, 8–9 (2012). https://doi.org/10.1038/ngeo1361
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DOI: https://doi.org/10.1038/ngeo1361
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