It's estimated a third of the Upper Midwest's cropland has lost all of its topsoil, which is vital for growing crops. Even if there's a dispute on the number, scientists agree the loss is a problem.
Copyright 2021 NPR
It's estimated a third of the Upper Midwest's cropland has lost all of its topsoil, which is vital for growing crops. Even if there's a dispute on the number, scientists agree the loss is a problem.
Copyright 2021 NPR