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The Times of India
The Times of India
World
TOI World Desk

During 2019-20, scientists dried Arizona’s Biosphere 2 rainforest; below 19% soil moisture, its soil switched from absorbing VOCs to releasing them into the air

A rainforest floor may look quiet, but beneath the vegetation, soil microbes are constantly exchanging gases with the atmosphere. During a controlled drought inside Arizona's Biosphere 2, scientists found that this exchange could change direction as the soil dried. When soil moisture fell below about 19%, soil that had been acting as a net sink for several volatile organic compounds (VOCs) began releasing some of them into the air.

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