Soil is one of the most unappreciated of the earth’s resources. We use it epitomise lack of value – if your name is mud, for example, or if you are dirt poor. Because we don’t think about it or value it, we don’t look after soil. Because we don’t look after it, over-grazing and over-tilling it, we are losing it at a speed of 24 billion tonnes a year.
It takes 2,000 years to lay down a ten centimeter thick layer of soil under normal conditions, so we really ought to treat soil as a finite resource. Here’s a neat video on the subject, which happens to be a cut above your average campaign animation as well as on an overlooked environmental topic.
For more, see Global Soil Week.