There is a dark side to the humble raindrop

A single drop is harmless, but when billions of raindrops fall from a cloudburst onto bare soil they strike like billions of tiny hammers, dislodging tons of soil per acre which is carried away by surface runoff.

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<p><a href="http://www.physorg.com/news88430865.html">There is a dark side to the humble raindrop</a></p> <p>A single drop is harmless, but when billions of raindrops fall from a cloudburst onto bare soil they strike like billions of tiny hammers, dislodging tons of soil per acre which is carried away by surface runoff.</p>