the oil we eat
been meaning to post this stellar richard manning article from harper's for over a year now. titled "The Oil We Eat: Following The Food Chain Back To Iraq", its the best examination ive read yet of our global food system.
theres not much else to say except that i reccomend it highly. heres a few snippets to pique your curiosity:
Oil is annual primary productivity stored as hydrocarbons, a trust fund of sorts, built up over many thousands of years. On average, it takes 5.5 gallons of fossil energy to restore a year’s worth of lost fertility to an acre of eroded land—in 1997 we burned through more than 400 years’ worth of ancient fossilized productivity, most of it from someplace else.
...
What would happen when the planet’s supply of arable land ran out? We have a clear answer. In about 1960 expansion hit its limits and the supply of unfarmed, arable lands came to an end. There was nothing left to plow. What happened was grain yields tripled.
...
The common assumption these days is that we muster our weapons to secure oil, not food. There’s a little joke in this. Ever since we ran out of arable land, food is oil. Every single calorie we eat is backed by at least a calorie of oil, more like ten. In 1940 the average farm in the United States produced 2.3 calories of food energy for every calorie of fossil energy it used. By 1974 (the last year in which anyone looked closely at this issue), that ratio was 1:1. And this understates the problem, because at the same time that there is more oil in our food there is less oil in our oil. A couple of generations ago we spent a lot less energy drilling, pumping, and distributing than we do now. In the 1940s we got about 100 barrels of oil back for every barrel of oil we spent getting it. Today each barrel invested in the process returns only ten, a calculation that no doubt fails to include the fuel burned by the Hummers and Blackhawks we use to maintain access to the oil in Iraq.
...
Green eaters, especially vegetarians, advocate eating low on the food chain, a simple matter of energy flow. Eating a carrot gives the diner all that carrot’s energy, but feeding carrots to a chicken, then eating the chicken, reduces the energy by a factor of ten. The chicken wastes some energy, stores some as feathers, bones, and other inedibles, and uses most of it just to live long enough to be eaten. As a rough rule of thumb, that factor of ten applies to each level up the food chain, which is why some fish, such as tuna, can be a horror in all of this. Tuna is a secondary predator, meaning it not only doesn’t eat plants but eats other fish that themselves eat other fish, adding a zero to the multiplier each notch up, easily a hundred times, more like a thousand times less efficient than eating a plant.
This is fine as far as it goes, but the vegetarian’s case can break down on some details. On the moral issues, vegetarians claim their habits are kinder to animals, though it is difficult to see how wiping out 99 percent of wildlife’s habitat, as farming has done in Iowa, is a kindness. In rural Michigan, for example, the potato farmers have a peculiar tactic for dealing with the predations of whitetail deer. They gut-shoot them with small-bore rifles, in hopes the deer will limp off to the woods and die where they won’t stink up the potato fields.
Animal rights aside, vegetarians can lose the edge in the energy argument by eating processed food, with its ten calories of fossil energy for every calorie of food energy produced. The question, then, is: Does eating processed food such as soy burger or soy milk cancel the energy benefits of vegetarianism, which is to say, can I eat my lamb chops in peace? Maybe. If I’ve done my due diligence, I will have found out that the particular lamb I am eating was both local and grass-fed, two factors that of course greatly reduce the embedded energy in a meal. I know of ranches here in Montana, for instance, where sheep eat native grass under closely controlled circumstances—no farming, no plows, no corn, no nitrogen. Assets have not been stripped. I can’t eat the grass directly. This can go on. There are little niches like this in the system. Each person’s individual charge is to find such niches.
Chances are, though, any meat eater will come out on the short end of this argument, especially in the United States. Take the case of beef. Cattle are grazers, so in theory could live like the grass-fed lamb. Some cattle cultures—those of South America and Mexico, for example—have perfected wonderful cuisines based on grass-fed beef. This is not our habit in the United States, and it is simply a matter of habit. Eighty percent of the grain the United States produces goes to livestock. Seventy-eight percent of all of our beef comes from feed lots, where the cattle eat grain, mostly corn and wheat. So do most of our hogs and chickens. The cattle spend their adult lives packed shoulder to shoulder in a space not much bigger than their bodies, up to their knees in shit, being stuffed with grain and a constant stream of antibiotics to prevent the disease this sort of confinement invariably engenders. The manure is rich in nitrogen and once provided a farm’s fertilizer. The feedlots, however, are now far removed from farm fields, so it is simply not “efficient” to haul it to cornfields. It is waste. It exhales methane, a global-warming gas. It pollutes streams. It takes thirty-five calories of fossil fuel to make a calorie of beef this way; sixty-eight to make one calorie of pork.
Still, these livestock do something we can’t. They convert grain’s carbohydrates to high-quality protein. All well and good, except that per capita protein production in the United States is about double what an average adult needs per day. Excess cannot be stored as protein in the human body but is simply converted to fat. This is the end result of a factory-farm system that appears as a living, continental-scale monument to Rube Goldberg, a black-mass remake of the loaves-and-fishes miracle. Prairie’s productivity is lost for grain, grain’s productivity is lost in livestock, livestock’s protein is lost to human fat—all federally subsidized for about $15 billion a year, two thirds of which goes directly to only two crops, corn and wheat.
ok. read it yourself and tell me what you think.
theres not much else to say except that i reccomend it highly. heres a few snippets to pique your curiosity:
Oil is annual primary productivity stored as hydrocarbons, a trust fund of sorts, built up over many thousands of years. On average, it takes 5.5 gallons of fossil energy to restore a year’s worth of lost fertility to an acre of eroded land—in 1997 we burned through more than 400 years’ worth of ancient fossilized productivity, most of it from someplace else.
...
What would happen when the planet’s supply of arable land ran out? We have a clear answer. In about 1960 expansion hit its limits and the supply of unfarmed, arable lands came to an end. There was nothing left to plow. What happened was grain yields tripled.
...
The common assumption these days is that we muster our weapons to secure oil, not food. There’s a little joke in this. Ever since we ran out of arable land, food is oil. Every single calorie we eat is backed by at least a calorie of oil, more like ten. In 1940 the average farm in the United States produced 2.3 calories of food energy for every calorie of fossil energy it used. By 1974 (the last year in which anyone looked closely at this issue), that ratio was 1:1. And this understates the problem, because at the same time that there is more oil in our food there is less oil in our oil. A couple of generations ago we spent a lot less energy drilling, pumping, and distributing than we do now. In the 1940s we got about 100 barrels of oil back for every barrel of oil we spent getting it. Today each barrel invested in the process returns only ten, a calculation that no doubt fails to include the fuel burned by the Hummers and Blackhawks we use to maintain access to the oil in Iraq.
...
Green eaters, especially vegetarians, advocate eating low on the food chain, a simple matter of energy flow. Eating a carrot gives the diner all that carrot’s energy, but feeding carrots to a chicken, then eating the chicken, reduces the energy by a factor of ten. The chicken wastes some energy, stores some as feathers, bones, and other inedibles, and uses most of it just to live long enough to be eaten. As a rough rule of thumb, that factor of ten applies to each level up the food chain, which is why some fish, such as tuna, can be a horror in all of this. Tuna is a secondary predator, meaning it not only doesn’t eat plants but eats other fish that themselves eat other fish, adding a zero to the multiplier each notch up, easily a hundred times, more like a thousand times less efficient than eating a plant.
This is fine as far as it goes, but the vegetarian’s case can break down on some details. On the moral issues, vegetarians claim their habits are kinder to animals, though it is difficult to see how wiping out 99 percent of wildlife’s habitat, as farming has done in Iowa, is a kindness. In rural Michigan, for example, the potato farmers have a peculiar tactic for dealing with the predations of whitetail deer. They gut-shoot them with small-bore rifles, in hopes the deer will limp off to the woods and die where they won’t stink up the potato fields.
Animal rights aside, vegetarians can lose the edge in the energy argument by eating processed food, with its ten calories of fossil energy for every calorie of food energy produced. The question, then, is: Does eating processed food such as soy burger or soy milk cancel the energy benefits of vegetarianism, which is to say, can I eat my lamb chops in peace? Maybe. If I’ve done my due diligence, I will have found out that the particular lamb I am eating was both local and grass-fed, two factors that of course greatly reduce the embedded energy in a meal. I know of ranches here in Montana, for instance, where sheep eat native grass under closely controlled circumstances—no farming, no plows, no corn, no nitrogen. Assets have not been stripped. I can’t eat the grass directly. This can go on. There are little niches like this in the system. Each person’s individual charge is to find such niches.
Chances are, though, any meat eater will come out on the short end of this argument, especially in the United States. Take the case of beef. Cattle are grazers, so in theory could live like the grass-fed lamb. Some cattle cultures—those of South America and Mexico, for example—have perfected wonderful cuisines based on grass-fed beef. This is not our habit in the United States, and it is simply a matter of habit. Eighty percent of the grain the United States produces goes to livestock. Seventy-eight percent of all of our beef comes from feed lots, where the cattle eat grain, mostly corn and wheat. So do most of our hogs and chickens. The cattle spend their adult lives packed shoulder to shoulder in a space not much bigger than their bodies, up to their knees in shit, being stuffed with grain and a constant stream of antibiotics to prevent the disease this sort of confinement invariably engenders. The manure is rich in nitrogen and once provided a farm’s fertilizer. The feedlots, however, are now far removed from farm fields, so it is simply not “efficient” to haul it to cornfields. It is waste. It exhales methane, a global-warming gas. It pollutes streams. It takes thirty-five calories of fossil fuel to make a calorie of beef this way; sixty-eight to make one calorie of pork.
Still, these livestock do something we can’t. They convert grain’s carbohydrates to high-quality protein. All well and good, except that per capita protein production in the United States is about double what an average adult needs per day. Excess cannot be stored as protein in the human body but is simply converted to fat. This is the end result of a factory-farm system that appears as a living, continental-scale monument to Rube Goldberg, a black-mass remake of the loaves-and-fishes miracle. Prairie’s productivity is lost for grain, grain’s productivity is lost in livestock, livestock’s protein is lost to human fat—all federally subsidized for about $15 billion a year, two thirds of which goes directly to only two crops, corn and wheat.
ok. read it yourself and tell me what you think.
posted by andy at 12:31 PM
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