In The Detroit News, from detnews.com, on the 30th April 2008, there was an article about the eroding of topsoil. It reports that,
Nutrient-rich topsoil is being eroded much faster than it can be replenished, experts say.
On average, the planet is covered with little more than three feet of topsoil, the shallow skin of nutrient-rich matter that sustains most of our food and also appears to play a critical role in supporting life on Earth.
The National Academy of Sciences has determined that cropland in the U.S. is being eroded at least 10 times faster than the time it takes for lost soil to be replaced.
Doctor Montgomery, author of “Dirt: The Erosion of Civilizations”, says,
"Globally, it's pretty clear we're running out of dirt,"
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