(Answer: It’s not really organic)
This is a long one, so here’s the executive summary:
- “Organic” food is defined as not having “synthetic” inputs
- “Synthetic” is defined as being derived from petroleum or natural gas (I.e., fossil fuels or petrochemicals)
- Almost all organic farms use petrochemicals, although not as fertilizers or pesticides
- Therefore, “organic” food is not truly organic, as it is still dependent on fossil fuels
- Modern “organic” farming is nothing like traditional farming practiced prior to the discovery of fossil fuels
- Many “local” foods are dependent on non-local inputs, such as animal feeds and petrochemicals
- Some “local” and “organic” foods actually use more fossil fuels and produce more greenhouse gases than their conventional, non-local counterparts
- Traditional farms were more energetically efficient than modern industrial agriculture, which wastes most of the energy used
- Fossil fuels are non-renewable and heavily polluting, and therefore are inherently unsustainable
- For organic and local to truly be sustainable, it must not pollute or depend on non-renewable resources
- Only “fossil fuel free” food can be truly sustainable, by this definition
- Alternatively, “sustainable” agriculture should be sufficiently diverse and adaptable to changing conditions
My best friend, Phil, and I have been engaged in an ongoing debate about whether “organic” food is merely a fad and a marketing gimmick. Phil and I are old buddies from the OSU Honors College, and have taken many science courses together, ranging from genetics to biochemistry. Phil, a pathologist, claims that all food is “organic” by definition because it contains organic molecules, or molecules constructed around a backbone of multiple carbon atoms (either in a ring or chain form). Therefore, according to this argument, the USDA “organic” label is essentially meaningless. Although I cannot argue with the textbook chemistry definition of “organic”, I like to point out that the word has multiple definitions, one of which is “a carbon-based compound”, and another of which is “any substance derived from living organisms”. In other words, “organic” can also mean “not synthetic.”
The current USDA standards for organic agriculture closely follow the latter definition, in that the standards prohibit farmers from using “synthetic” fertilizers or pesticides, but permit most pesticides and fertilizers derived from plant or animal sources, as well as some naturally occurring mined substances, such as copper (used as a fungicide), sulfur (used to lower soil pH), or lime (used to raise pH). So when most well informed people think of “organic” farming, they think of soil whose fertility is provided by cover crops, mulches, and compost composed of plant materials and animal wastes as opposed to fertilizers synthesized from natural gas. Or they envision crops sprayed with gentle compost teas and biodegradable plant oils to ward off pests and diseases instead of using toxic synthetic chemicals. The popular notion that “organic” farms do not use “chemicals” is a common misconception, as compost and animal manures themselves are complex soups of naturally occurring chemicals resulting from the breakdown of plant and animal materials, and USDA organic standards do permit the use of pesticides derived from “natural” sources.
However, the example of lime as an organic soil amendment illustrates a catch in this commonly accepted definition of “organic”. Lime (usually CaCO3 and MgCO3) is considered a natural and “organic” substance by USDA standards – even though it is technically an inorganic molecule – because it is mined, usually from limestone or chalk quarries, and not synthesized in a laboratory or factory. Lime also happens to originate from formerly living organisms, as most are the remains of shells from ancient fossilized coral reefs and single-celled marine algae (phytoplankton). Does this description sound at all familiar to you? It should. I’ll give you a hint: think of the most important, and perhaps the most volatile, commodity on the global market today.
If you guessed “oil”, give yourself a pat on your organic back. Here’s the problem: oil – or petroleum, to be more exact – is essentially no different than lime. Like limestone, petroleum is a mined substance that originated primarily from ancient fossilized marine algae and was not synthesized in a laboratory. So why is one considered “organic” and the other “synthetic”? Good question. Both are originally derived from living organisms. Both are effectively non-renewable, as they were formed millions of years ago through very slow fossilization and plate tectonic processes (as an aside, wood ash is another form of lime that is renewable).
It appears that the difference is largely one of semantics; “synthetic” effectively means “derived from petroleum”. Today, whenever you hear of something referred to as “synthetic,” this almost always means that it was manufactured using petroleum, or its cousin natural gas, as a major feedstock. For instance, synthetic fibers = petroleum derivatives. Synthetic wood = plastic wood = petroleum derivative. Synthetic fertilizers = natural gas derivative, and synthetic pesticides = petrochemicals. The issue is not that oil or natural gas are fundamentally different from “organic” substances. They are not. Many “organic” substances are also non-renewable, mined materials of natural origin. Delve deep enough into the philosophy of nature literature and you’ll find that the “natural” vs. “artificial/synthetic” divide is completely a human construct stemming from our western/modern desire to control nature and draw a distinction between what is “human” and what is “natural.” In reality, no such distinction exists. Petroleum is organic, humans are animals, and “artificial/synthetic” products are inherently natural, despite labeling them otherwise. Rather, the problem with The Great Organic Debate is that we have framed the definition of “organic” vs. “synthetic” to set petrochemicals apart from other “organic” substances, even though petroleum meets the classic definitions of “organic” on both accounts: carbon-based compounds of plant or animal origin.
So, in summary, “synthetic” means based on, derived from, or using fossil fuels, whereas “organic” should mean avoiding or prohibiting the use of fossil fuels. Here’s the problem: strictly speaking, there is virtually no organic farm nowadays that does not use “synthetic” petrochemicals in some manner. What was just 150 years ago an all but unknown substance is now, today, the cheapest and most readily available form of energy. With the exception of a few animal-powered farms that grow their own animal feed (e.g., some Amish communities), virtually every “organic” farm depends on petroleum to power tractors, harvest crops, weed their fields, and transport produce. Your “organic” food is just as dependent on petroleum and other fossil fuels as any “non-organic” food. The use of fossil fuels is currently the largest source of greenhouse gases and air and water pollution worldwide. Michael Pollan correctly pointed out the fact that many large organic farms actually use more petroleum and produce more greenhouse gases per calorie of food produced than their conventional counterparts, since they have to rely upon flame weeding or tractor cultivation to deal with weeds, rather than synthetic herbicides. Although the net greenhouse gas footprints of organic vs. conventional farming is a point of controversy, the fact that both systems heavily depend on fossil fuels makes the debate somewhat irrelevant: both contribute heavily to climate change.
Similarly, many “local” foods are not, strictly speaking, “local.” Most “locally grown” organic vegetables rely upon animal manures that are often transported hundreds or thousands of miles to maintain soil fertility. Hence, the term “manure miles” has been coined to counter the popularized notion of “food miles” and highlight the fact that agricultural inputs are just as important for sustainability and health as the end product. Likewise, many “local” animal products, such as dairy, meats, and eggs, are produced using animal feeds that were grown thousands of miles away. Get this: if you buy a “locally grown” chicken in Washington and a “non-local” chicken, and both chickens were fed grains grown in the Midwest (a likely scenario), then the “non-local” chicken probably has a smaller greenhouse gas footprint if that chicken was raised nearby its food source. This is because it takes a lot more energy, and consequently more fossil fuels, to transport animal feed than to transport the animals themselves, since it takes about two pounds of grain to grow one pound of chicken (feed conversion ratio).
The two organic farms I am currently working for both use propane to power torches for flame weeding (which is a blast, but produces tremendous amounts of pollution and greenhouse gas emissions), and petroleum to power tractors for cultivation. One of them utilizes municipal compost for soil fertility, and the compost is managed and transported using heavy, diesel-powered, equipment. The other uses a combination of horse manure and pelleted chicken waste. In both cases, the animals that provide the manure were fed using crops grown, harvested, and/or transported using petrochemicals. It is exceedingly difficult nowadays to find a farm that provides both its necessary labor and soil fertility without relying upon fossil fuels. In essence, as a consequence, we are all completely addicted to these non-renewable, and heavily polluting, resources.
The difference between organic and conventional farms is that organic farmers are not allowed to apply petrochemicals directly to the crops or to the soil. I personally find this distinction to be a bit arbitrary, although I will concede that synthetic petrochemicals tend to be more toxic (although not always) and more persistent in the environment than “organic” chemicals, due to the inability of microbes to metabolize petrochemicals with which they did not co-evolve. The soil simply lacks the enzymatic and cellular machinery to biodegrade many (but not all) petrochemicals, which is why their use in agriculture is so insidious – many of them persist and accumulate in the environment, with often harmful effects, for years after their application. In contrast, most organic chemicals are derived from plants, animals, fungi, or bacteria and readily break down into harmless chemicals, like water and CO2, in a short period of time. But again, this is an arbitrary distinction. For instance, the controversial use of copper sulfate as an approved organic fungicide has the potential to pollute adjacent watersheds, since copper – being a heavy metal – cannot decompose.
As a society, we like to romanticize farming as a very traditional profession, steeped in ancient practices that are thousands of years old and deeply connected to a local land and resource base. For ten thousand years, farmers grew food using entirely locally sourced fertility and human and animal labor. They fed their animals with plant materials they grew themselves, on their own farm, and they recycled their animal wastes to maintain soil fertility. They drove their equipment with grass-powered internal combustion engines (i.e., draft horses and oxen), and used human labor for smaller tasks. To buy seeds or deliver produce to market, they traveled by foot or hoof. The notions of “local” and “organic” did not even exist because no alternative was possible; everything was by necessity local and organic in the truest sense as petrochemicals had not yet been discovered and long-distance transportation networks were rarely used due to the great risk and expense they entailed. In modern farming – organic and conventional alike – nothing could be further from the truth. If you suddenly were to take petrochemicals out of the equation, nearly every modern farming operation would rapidly grind to a halt. This should strike you immediately as a serious problem of global food insecurity, especially as concerns about peak oil or Iran closing the Strait of Hormuz loom large.
In reality, there is very little that is romantic about traditional agriculture. It was exceedingly hard and dangerous work, with intense physical labor from dawn to dusk, and the constant threat of catastrophic harvest failures that could not be buffered by crop insurance or mitigated by food transportation networks. To be certain, fossil fuels have alleviated many of these concerns by providing a cheap source of energy (and thus labor), opening up global markets (often at the cost of local ones), and facilitating the ease of importing diverse foods and agricultural inputs from distant regions. But let’s be clear: modern agriculture – both organic and conventional – is anything but sustainable. In fact, industrial agriculture produces vast inefficiencies in food production when compared to traditional farming methods. One estimate holds that industrial farming methods, regardless of whether conventional or organic, only produce about one calorie of food energy (i.e., output) for every ten calories of energy used (i.e., input). In other words, 90% of the energy in the system is wasted, mostly in the form of burning fossil fuels. In contrast, the output to input ratio for traditional farming methods, which are non-mechanized and labor intensive, is closer to one to four, so that four calories of biomass produce about one calorie of food. According to this estimate, traditional “fossil fuel free” farming is 2.5 times more efficient thermodynamically than modern industrial agriculture. If traditional farming were as inefficient as modern farms are today, then the farmers of the past, and their animals, would have probably starved.
Back to my friend, Phil. Phil is fond of rebutting arguments about the virtues of organic food by stating that “organic” is merely a marketing gimmick, an arbitrary label, and a short-lived fad, and that organic foods are not necessarily any more environmentally sustainable, economic, or energy efficient than conventional foods. I admit, I have to concede that he may have a point for all the reasons listed above, which may surprise you given that I am an organic farmer.
So, let’s reframe the debate in a more logically consistent fashion. Should organic foods be permitted to use fossil fuels for inputs other than fertilizers and pesticides? More to the point, is it even possible to grow food sustainably in a manner that uses fossil fuels? I submit that it is not. To be sustainable, farming should rely entirely on renewable resources and should not pollute the air, water, and soil that sustains our lives. It seems a contradiction in terms to claim that a cultural practice is sustainable when it depletes, or depends upon, a heavily polluting non-renewable resource. Sustainable, after all, means to provide for the needs of the present while not compromising the ability of future generations to do the same. Only fossil fuel free farming can fit this bill, but virtually nobody today seems to be practicing this.
I’m sure Phil would have something to say about this conclusion, and as always his perspective would be a uniquely rational and moderate one. After all, why not use fossil fuels for food production while they’re readily available? As a medical doctor, I’m certain that Phil is aware of how tremendously medical research and technology have benefited from the cheap energy and diverse products, such as plastics, made possible by petrochemicals (remember the “Plastics Make It Possible” ad campaign sponsored by the plastics industry?). Certainly, countless lives have been saved through the wise application of medical science and technology enabled by fossil fuels. Likewise, petrochemical based food production and transportation has fed billions of people and staved numerous famines, although often at a great cost to the environment and to small traditional farmers.
Perhaps another reasonable response to the question of sustainability is that, to be sustainable, an agricultural system must simply be sufficiently diverse, adaptive, and flexible that it can easily revert from a dependence upon any particular resource or input when it becomes necessary to do so. I’ll buy that. We have seven billion people to feed on this planet, and if we are to be successful in providing for future generations as the Earth’s resources become increasingly strained, perhaps the best approach is to take as many different approaches as possible. Let’s try a little of everything and see what works as the economic, environmental, and geopolitical conditions on the ground change (and as the climate changes). Let’s provide farmers with the resources, support, and education necessary to adapt to changing markets and pressures, to changing supply and demand, and to a changing climate.
Phil – care for a rebuttal?