In previous posts I've addressed whether "organic" foods contain more nutrients or fewer toxins than conventionally-grown foods.[1] The only claim made by "organic" farming left to consider is its impact on the environment versus conventional farming methods. This can be broken down into four sub-claims: that "organic" farming is better for the soil, produces less pollution, increases biodiversity, and is sustainable. Let's see if it's true.
The third claim: Is "organic" farming better for the environment?
The answer: No.
The answer: No.
The answer: Yes.
The third claim: Is "organic" farming better for the environment?
- The first sub-claim: Is "organic" farming better for the soil?
The answer: No.
- The second sub-claim: Does "organic"" farming produce less pollution?
The answer: No.
- The third sub-claim: Does "organic" farming increase biodiversity?
The answer: Yes.
- The fourth sub-claim: Is "organic" farming sustainable?
The answer: No.[10]
The overall answer: No.[11]
Notes:
[1] These posts can be read here (nutrients) and here (toxins).
[2] Incidentally, this is when those same nutrients leach out into the water supply.
[2] Incidentally, this is when those same nutrients leach out into the water supply.
[3] Tuomistoa, H. L. et al. (2012) "Does organic farming reduce environmental impacts? – A meta-analysis of European research." J Environ Manage, 112: 309–320.
[4] Kramer, S. B. et al. (2006) "Reduced nitrate leaching and enhanced denitrifier activity and efficiency in organically fertilized soils." Proc. Natl. Acad. Sci. USA, 103 (12): 4522–7.
[5] Foster, C. et al. (2007) "Environmental Impacts of Food Production and Consumption: A Report to the Department for Environment, Food and Local Affairs." (.pdf) Manchester Business School, Defra, London.
[6] Trewavas, A. (2001) "Urban Myths of Organic Farming." (.pdf) Nature, 410: 409–410.
[7] Invertebrates include insects, spiders, earthworms, and mollusks (slugs and snails). Microbes include bacteria, fungi, and nematodes. See Hole, D. G. et al. (2005) "Does Organic Farming Benefit Biodiversity?" (.pdf) Biological Conservation, 122: 113–130. doi:10.1016/j.biocon.2004.07.018
[8] Many of the high yields reported for "organic" farms have been inflated or misrepresented. See http://www.thetruthaboutorganicfoods.org/2007/09/14/"organic-abundance"-report-fatally-flawed/. According to the paper cited in [6], "organic" yields are typically 50–70% of conventional yields. See also http://www.nature.com/news/organic-farming-is-rarely-enough-1.10519#/b1.
[9] There is currently only enough manure produced each year to feed about one-fifth of the world population using "organic" methods. See http://www.thetruthaboutorganicfoods.org/2007/08/14/can-organic-really-feed-the-world-activism-disguised-as-science/. However, this manure would have to be produced "organically", which would require that the animals consume only wild browse or "organic" feed. The "organic" feed would require "organic" manure. And so on. This manure shortfall could be offset by using 'night soil', but that is fraught with danger (nor is it allowed under current "organic" standards).
[10] "Organic" farming methods have also been reported to stress aquifers—not good for the environment. See http://www.nytimes.com/2011/12/31/science/earth/questions-about-organic-produce-and-sustainability.html.
[11] For a rebuttal to the concerns I've raised in these posts about "organic" farming, see "Organic Food and Farming: Myth and Reality" (.pdf). Note that it was prepared by the Soil Association and Sustain, two UK-based thinktanks which encourage "organic" farming methods. While some of their arguments are sound, many are emotionally based, appealing to the perception of what "organic" farming should be, not the reality of what it is. See also "Is Eating Organic BS?" (Part I and Part II), an article by a raw-food vegan which reviews an episode of Penn and Teller: B.S.! which offers some of the same rebuttals I've mentioned here. Note that he dismisses the idea that "organic" food tastes better than conventionally-grown food.
Image attribution:
Mountain wildflowers are by Alex Lovell-Troy, available at http://www.flickr.com/photos/94361969@N00/3646848855.
No comments:
Post a Comment