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Here’s why soil smells so good after it rains

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New Africa/Shutterstock Klas Flärdh, Lund University and Paul Becher, Swedish University of Agricultural Sciences Did you ever wonder what causes that earthy smell that rises after a light summer rain? That mysterious scent has been called “petrichor”, and a main component of it is an organic compound called geosmin, which lingers around moist soil. Geosmin comes from the ancient Greek …

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