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Fog is riddled with bacteria, study finds
Researchers found fog droplets carried more than 1 million bacteria, raising questions about air quality and health effects.
Arizona State University researchers discovered that fog droplets contain millions of living, active bacteria, revealing fog acts as a habitat for microorganisms actively growing within moisture.
This type of fog forms under stagnant air conditions, prevalent throughout the United States and forming overnight as the ground cools and stabilizes, according to the research team.
A thimble worth of fog water contains some 10 million bacteria, the researchers said, which actively consume atmospheric pollutants while breaking down simple carbon compounds.
One bacterial group—methylobacteria—stood out from the fog samples, consuming simple carbon and revealing complex microbial processes occurring within Earth's atmosphere.
Researchers emphasize more studies are needed to determine whether these bacterial communities significantly impact human health or broader environmental systems on Earth.