Generating three centimeters of top soil takes 1,000 years, and if current rates of degradation continue all of the world's top soil could be gone within 60 years, a senior UN official said on Friday.
About a third of the world's soil has already been degraded, Maria-Helena Semedo of the Food and Agriculture Organization (FAO) told a forum marking World Soil Day.
I haven't found a transcript of Semedo's speech, or any basis for her statement. I find it curious that such a dire statement supposedly made by a credible authority is not much more widely supported on the web.
Is the world's top soil predicted to be gone in 60 years, according to scientists?