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Topsoil Loss through 2014
UN FAO report warns about loss of soil biodiversity

only 60 years of topsoil left at the current loss rate      web

webhttps://www.scientificamerican.com/article/only-60-years-of-farming-left-if-soil-degradation-continues/
authorChris Arsenault
publicationScientific American
date2014-12-05

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