How We Can Free Ourselves from a Fossil-Fuel-Soaked Diet

By Rebekah and Stephen Hren, Chelsea Green Publishing. Posted June 11, 2009.

The following is an excerpt from The Carbon-Free Home: 36 Remodeling Projects to Help Kick the Fossil-Fuel Habit by Stephen and Rebekah Hren. It has been adapted for the Web.

You might think it was the business of agriculture to capture the energy of the sun for our nourishment. If you are thinking about the "food" that comes to reside on most Americans' tables at mealtime, you would be very wrong. Sunshine has little to do with it.

Instead, what you would find would mostly be a product of fossil fuels. There's the oil and natural gas for the manufacture of fertilizer (31 percent), for the operation of the machinery (19 percent), for the product's transportation (16 percent), irrigation (13 percent), pesticides (5 percent), and other miscellaneous squanderings (16 percent). And this doesn't even count the fossil fuels burned for the packaging, refrigeration, and transportation of that sunlight-deficient product from the retail outlet to the home. In sum, on average an American consumes 12 barrels of oil equivalents (504 gallons) for energy used in the home, 10 barrels (420 gallons) for food production and distribution, and another 9 barrels (378 gallons) for transportation.

The 420 gallons of oil equivalents used to produce the average 2,175 pounds of food a year the average American eats (compared to the world average of 1,630 pounds) boils down to spending 10 fossil-fuel calories for each one food calorie. It doesn't sound like a good idea, nor does it sound efficient, but that's what most of us depend on to stay alive every day -- fossil calories.

How did things get to such a sorry state? As with many things, our move toward convenience has come at the cost of our independence. Where at one time many families grew some of their own food and knew the grower of any other food they consumed, now the grower of our food is on average 1,500 miles away, and oftentimes much farther. We had the misfortune of buying some garlic grown in China recently. Growing this staple 8,000 miles away seems like a bad idea to us, but most Americans don't realize nor do they care where the garlic they buy comes from. In 2005, garlic imports rose to 100 million pounds, while being almost nonexistent five years earlier. If this is what the wisdom of the marketplace dictates, then we suggest that the market is not very bright.

The very large distances we are making our food travel has another downside. This is the removal of nutrients from where they are needed: where the food is being grown. Exporting produce thousands of miles away ensures that the nutrients locked in that food cannot ever be returned to the soil from which they came to cycle through again. This deficiency ensures the missing nutrients must be replaced by fossil fuels or other fossil accumulations that are being rapidly depleted, such as phosphorus.

When we consider these facts in the context of peak fossil energy and global climate disruption, then it's not surprising if our first reaction is some good oldfashioned fear and loathing. Not only is our food system consuming unsustainable amounts of energy (a 10-to-1 ratio of calories in to calories out), it's also overconsuming our water and topsoil resources at a prodigious rate. Can there be any hope of rectifying a situation that has gone so awry?

See more stories tagged with: food, farming, food system, sustainable agriculture, sustainable farming

Rebekah and Stephen Hren are the authors of The Carbon-Free Home: 36 Remodeling Projects to Help Kick the Fossil-Fuel Habit from Chelsea Green.

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