“Taking the long view, we are running out of dirt.” —David R. Montgomery, geologist
Jeremy Grantham, the curmudgeonly head of the money manager GMO, wrote about soil depletion in his last quarterly letter. “Our farmers are in the mining business! Yes, the soil is incredibly deep, but it is still finite.”
“Globally, it’s clear we are eroding soils at a rate much faster than they can form,” notes John Reganold, a soils scientist at Washington State University.