Approximately 3,000 years are needed to create 15 cm of new topsoil. 15 cm is the minimum amount of topsoil required to grow healthy crops. But today, the rate of soil depletion across the globe is outstripping by far the rate of the new soil formation.Every year, the U.S. loses soil 18 times faster than it is able to replenish it. And in some places the situation is even worse: some developing countries are losing even double that amount. Not to mention, China where the rate of depletion is as
