A new study has found that removing native forest and putting in farms can accelerate erosion so dramatically that in a few decades as much soil is lost as would naturally occur over thousands of years.
Had you stood on the banks of the Roanoke, Savannah, or Chattahoochee Rivers a hundred years ago, you'd have seen a lot more clay soil washing down to the sea than before European settlers began clearing trees and farming there in the 1700s. Around the world, deforestation and food productions have been blamed for increasing erosion above its natural rate.