This little piggy went to market. This little piggy stayed home. And this little piggy is genetically modified to poop less phosphorus, making it the most environmentally friendly pig in the world.
Like all animals, pigs' cells need phosphorus to make DNA, build cell membranes, and transport energy. But pigs can’t digest phytate, a phosphorus-heavy molecule in grains, so farmers fortify pig feed with pure phosphate or phytase, an enzyme that breaks usable phosphate off phytate. Still, pigs excrete nearly all the phosphorus they eat, and this washes into the ocean, where it feeds bacteria and algae that create oxygen “dead zones,” a major killer of marine wildlife.
The Enviropig is the first swine (a Yorkshire, to be exact) able to digest phytate on its own. The project started a decade ago when Cecil Forsberg, a biologist at the University of Guelph in Ontario, genetically modified pigs so that their salivary glands would secrete phytase. This allows the pigs, now in their eighth generation, to get their phosphate from grains alone, and to excrete about 40 percent less of it.Switching to Enviropig herds will be expensive for farmers, Forsberg says, but in the long run subtracting supplements will save $1.75 per pig annually—a windfall for a 100,000-pig farm. He is currently petitioning the U.S. Department of Agriculture and Health Canada for permission to serve Enviropig meat. “Unfortunately, it is illegal for us to do taste tests at this time, despite the temptation,” he says. “But I expect they’ll taste quite good.”
1. Make the enzyme
As the pig chews, the Escherichia coli genes implanted in its salivary glands begin promoting phytase production.
2. Break up the pollutant
Phytase begins breaking phytate into digestible phosphate in the mouth, but it really ramps up its activity when it hits the stomach’s strong acid.
3. Poop and pee away!
Because they don’t need phosphate supplements, Enviropigs excrete 30 to 65 percent less phosphorus.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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Or, could we feed pigs a more natural diet than grain? I'm assuming pigs are perfectly capable of extracting phosphorus from whatever they would eat in the wild. Correct me if I'm wrong.
this is crazy... to really tackle the environmental problems we should re-engineer human behavior and consciousness to once and for all stop man-made pollution and environmental interference.
@jenthehen
...You posted this from a computer. If you really knew your psychotic "green" trade, you'd know that computers are considered terrible electronic gadgets by consuming power and covering landfills.
/facepalm
@orangesrhyme
...and almost as, if not more, important as having a phone, whether it be for jobs, social life, or staying in the know. Just because he's on a computer doesn't mean his ideas or ideals for stopping environmental damage and climate change are invalid.
@orangesrhyme I was being sarcastic and am not at all a "green" fanatic, though I do advocate recycling. I tried to note how ridiculous this bioengineered pig is and question where the line will be drawn.
Pigs' genes would not have to be mutated if people were more cautious about their diets. The only reason this 'Enviropig' was created is because of our high demands in meat, which too much has been linked to health problems and lacking greens. Overcrowding on these meat farms that respond to our high meat demands is the problem for the excess pollution that people find in natural environments/habitats such as lakes.
An enviropig is not going to solve humanity's problems on environmental concerns from the waste that leaks from these farms as a result of overcrowding. Too much meat is not really the way to go in terms of your health anyway.
1) Sorry hippies, the answer is not to stop eating meat. Humans are built to have some meat in our diets, and we are healthier for it (though overindulgence is another issue entirely).
2) A natural pig diet would fix the pollution problem on the back end by moving it to the front. Sure, feeding more leafy greens to the porkers would solve the problem - at the cost of MANY more acres of feed crop, fertilizer, pestacide, etc.
3) Getting more from less with less waste is the core of being "green." Thus, this pig greens the industry - just not to the standard of an extreamist.
4) We genetically modify things all of the time through unnatural, artificial, manmade selection. Take a look a chicken and a jungle fowl. That is a great deal more genetic modification than this little porker.
5) You digest DNA. What the DNA is does not matter if it is not changing the protiens, fats, etc that you actually use. You don't become a pig from eating pig DNA - and you won't start producing phytase if you eat this pig.
More efficient pigs is an excellent idea.
We want high quality food to be CHEAPER, not more expensive.
That would be the good article certainly made this segment amazing.Keep it up!Excellent post. I like such themes and anything connected to high vis this matter. I definitely want to read more on that blog soon.
humans are made to eat meat. that's just a physiological fact. grains are bad for us, just like they're bad for hogs.
Oakspar77777 posits that feeding hogs a more natural diet would "cost ... MANY more acres of feed crop, fertilizer, pestacide, etc."
that simply is not true, unless we stick with the Confinement Feedlot Operation model -- which is the problem to begin with.
there is a greener way of growing hogs than altering their DNA: rotational grazing on marginal ag lands. Google "Rotational grazing;" you'll be surprised about how "green" eating meat can be.