I guess my question is how is sustainable agriculture being defined. Is it being defined by use of fossil fuels, water, other inputs....yields and soil use and quality?
But that has changed in the last two years because of 1.) changes to the farm bill and 2.) genetics. Without the same levels of subsidies farmers are focusing on efficiencies and that has equated with the steep growth of no till farming. No till means microorganisms aren't being exposed to air and so don't eat one another and decompose (steep reduction in greenhouse gas emissions). No exposed soil means that the water runs off into streams and rivers without carrying along mother earth for the ride (and fertilizer and other chemistries). No plowing means fewer trips through the field on the tractor and less fossil fuel use. Far less water consumed. Less labor. Same or higher yields.
The second change has been genetics which have brought along genetically modified crops. Since the introduction of gmo's, the use of chemical pesticides in the U.S. has been cut in half. The chemical industry views gmo's as a threat to its survival. Genetically modified crops make no till farming far more probable.
I'm just not clear where the linkage between increased efficiencies and production makes meat production more sustainable as it does not address methane (a GHG 21 times more powerful than CO2 in warming the environment) production or the pollution problems created by factory farming.
I'm not sold on transgenic or genetically engineered crops
Not sure that this is well reasoned. If one agrees that GHG emissions, for example, are a measure of efficiency and more efficient production equates with more sustainable production, then a net reduction in GHG emissions within the overall production process would make that process more efficient and therefore more sustainable (even if other parts of the process remain unchanged).
that you're equating efficiency in production and sustainability
"while animals living on farms will still emit their share of greenhouse gasses, grazing them on grass and returning their waste to the soil will substantially offset their carbon hoof prints, as will getting ruminant animals off grain."
majority of pasta that I buy is from Bionaturae, an organic Italian pastamaker,
Why do you suppose that land grant schools don't advocate this and some of the other concepts in Pollin's piece? Big ag $$$ telling them not to? Or, it's been looked at and doesn't stand up to economic scrutiny?
JamPhil wrote:I found particularly interesting this part of the freakonomics post linked to above -- quoting from a recent article in Environmental Science and Technology by Christopher L. Weber and H. Scott Matthews of Carnegie-Mellon:
"We find that although food is transported long distances in general (1640 km delivery and 6760 km life-cycle supply chain on average) the GHG emissions associated with food are dominated by the production phase, contributing 83% of the average U.S. household’s 8.1 t CO2e/yr footprint for food consumption. Transportation as a whole represents only 11% of life-cycle GHG emissions, and final delivery from producer to retail contributes only 4%. Different food groups exhibit a large range in GHG-intensity; on average, red meat is around 150% more GHG-intensive than chicken or fish. Thus, we suggest that dietary shift can be a more effective means of lowering an average household’s food-related climate footprint than “buying local.” Shifting less than one day per week’s worth of calories from red meat and dairy products to chicken, fish, eggs, or a vegetable-based diet achieves more GHG reduction than buying all locally sourced food."
That's why I just keep my reasons for eating local simple: (1) it tastes better and (2) I value the intangible romance involved in living in a community where people know their farmers and food artisans. I’d rather live in a world like that than one full of impersonal box stores and giant food corporations.
auxen1 wrote:I would think that if the food production and distribution infrastructure could be reoriented to favor local production then yes, reducing the number of miles food travels would lower transportation's contribution to GHG emissions. But doing so in today's system creates new inefficiencies. Believe that a major food retailer is looking at this very thing -- favoring local sourcing -- so there may be hope.
Diet would have a far larger and quicker impact though. Two pounds of grain are required as feed to produce one pound of chicken. For pork it's four pounds (2x chicken) and for beef its six pounds (3x chicken). Which explains 70% + of our corn going to animal feed.
If Americans cut there animal protein consumption in half they'd still be eating far more of the stuff than most of the rest of the world. They'd be thinner and healthier. And that grain could be redirected to renewable fuels (which is really a local industry).
Kennyz wrote: That's why I just keep my reasons for eating local simple: (1) it tastes better and (2) I value the intangible romance involved in living in a community where people know their farmers and food artisans.
it mostly ignores the points I am making
auxen1 wrote:it mostly ignores the points I am making
Vital Info, you made a point that if you reduce the miles food has to travel you would reduce the energy/emissions figure.
I did address this by suggesting that the current food complex is not built in such a manner that pulling the "reduce miles" lever does not equate with lower energy use or emissions. But, the largest retailer in the world is looking at this very thing and that might change.
But, today, simply reducing food miles to reduce energy use and emissions likely does not have the intended outcome you're looking for. That goes for beef production as well.
Suggesting that Americans would change consumption behavior (less animal protein) was stupid of me. It's not going to happen but it would have a huge beneficial impact to global warming.
Agree completely that if consumers would uniformly turn their backs on "long distance foods" it might help. Unlikely though.
Agree that attempting more sustainable purchasing behavior is good and useful, even when other behavior is bad. Our meat consumption is pretty indefensible though, when compared to the rest of the world. The "so what" on this one is so huge from a sustainability perspective it would take pages to describe.
Vital Information wrote:Yet, in general, why, all things being equal, don't they count.
Again, my example from above, if you have a choice between a Michigan apple and a Washington one, which one would you pick and why?
Vital Information wrote:Right now the stores stock asparagus and winter squash. Which should you buy?
LAZ wrote:Vital Information wrote:This spring, I bought a lot of strawberries. I didn't buy them based on origin but simply bought what looked good. Mostly they came from Michigan and California. I was surprised to find that, in general, the California strawberries not only had better flavor but kept longer.
Kennyz wrote:California strawberries - specifically varieties like those made by Driscoll which are bred to keep longer, are just an awful facsimile of what straberries are supposed to taste like. The real thing is juicy, acidic, and - yes - so delicate that they bruise relatively easily, and with such a high natural sugar content that when that happens, they rot quickly. Cut one open. I just about guarantee that your California strawberries are white inside - pale as the flavor and nutrition they provide. A real strawberry is a bright shade of red all the way through. There is virtually no way to eat a really good non-local strawberry.