This article is about one of them. Some people scoff at this idea, but it is a problem, and getting worse.
"Globally, it's clear we are eroding soils at a rate much faster than they can form," said John Reganold, a soils scientist at Washington State University. "It's hard to get people to pay much attention to this because, frankly, most of us take soil for granted."
The National Academy of Sciences has determined that cropland in the U.S. is being eroded at least 10 times faster than the time it takes for lost soil to be replaced.
The United Nations has warned of worldwide soil degradation -- especially in sub-Saharan Africa, where soil loss has contributed to the rapidly increasing number of malnourished people.
Healthy topsoil is a biological matrix, a housing complex for an incredibly diverse community of organisms -- billions of beneficial microbes per handful, nitrogen-fixing fungi, nutrients and earthworms whose digestive tracts transform the fine grains of sterile rock and plant detritus into the fertile excrement that gave rise to the word itself ("drit," in Old Norse).
As such, true living topsoil cannot be made overnight, Montgomery emphasized. Topsoil grows back at a rate of an inch or two over hundreds of years. Very slowly.
There are many problems like this, that go unnoticed, such as overfishing, over irrigation (and under irrigation, both of which contribute to loss of topsoil and loss of good farmland) over deforestation, problems with strip mining and the cleanup that often doesn't happen, over population in some areas (causing problems with water supply and putting more stress on the land) problems with recycling, issues with introduction of non native species that wreak havoc on native plants and animals, and some climate change (which is sometimes caused by combinations of all those factors). There are also a lot of human problems, such as disease, genocide and starvation that are directly attributable to some of those environmental issues.
I would encourage you to read "Collapse: How Societies Choose To Fail Or Succeed" by Dr. Jared Diamond to find out more, and to see what you can do.
We need to be good stewards of the earth God gave us.
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