Oil is what most of us think of as a strategic resource, yet in the long run it is soil which is the more important. Even so, people’s eyes tend to glaze over when talk turns to soil conservation, maybe because it’s so much easier to see the immediate relevance of rising gas prices and climate change in these days of peak oil. So while public attitudes on climate change have shifted dramatically over the past few years, a crisis in global agriculture remains hidden: we are, and have long been, using up the supply of topsoil we rely on to grow our food.
Those of us living in modern cities can easily forget that without fertile soil we could not survive. Yet modern agricultural techniques are eroding the very soil on which food production depends. This ongoing soil loss means we face the problem of feeding a growing population from a shrinking land base. This should be troubling because even a casual reading of history shows that, under the right circumstances, climatic extremes, political turmoil or resource abuse can bring down a society. And in the century ahead we face all three, as shifting climate patterns and depleted oil supplies coincide with progressive loss of farmland.
