No solution to our agricultural predicament
October 26th, 2009 by Jim JustCompared to any other human activity, land use and agriculture are the greatest emitters of greenhouse gasses.
You heard that right. More than the emissions from all the world’s passenger cars, trucks, trains and planes, or the emissions from all electricity generation or manufacturing. Of the three most important man-made greenhouse gasses — carbon dioxide emissions from deforestation, methane emissions from animals and rice fields, and nitrous oxide emissions from heavily fertilized fields — account for 30% of the total.
Jonathan Foley points out at Yale Environment 360 that since the last ice age, nothing has been more disruptive to the planet’s ecosystems than agriculture. Continued population growth is pushing global agricultural systems to their very limits. He asks:
Already, we have cleared or converted more than 35 percent of the earth’s ice-free land surface for agriculture, whether for croplands, pastures or rangelands. . . What will happen to our remaining ecosystems, including tropical rainforests, if we need to double or triple world agricultural production, while simultaneously coping with climate change?
We’re already exploiting Earth’s water resources in an unsustainable manner, drawing on fossil aquifers and draining rivers before they reach the sea. The use of industrial fertilizers and other chemicals has more than doubled the flows of nitrogen and phosphorus compounds in the environment and fundamentally upset the chemistry of the entire planet. How can Earth cope with future demands from increasing population and agricultural consumption?
Unfortunately, Foley’s answer is pretty feeble. First, acknowledge we have a problem. Then, “find ways to simultaneously increase production of our agricultural systems while greatly reducing their environmental impacts” – what he calls a “greener agricultural revolution.”
What Foley can’t admit is, we don’t have a “problem” that can be solved with yet another technofix. We’re in a predicament, from which there’s no solution, no easy way out. The best we can hope for is to face our predicament squarely, with as much courage and grace as we can muster.