The article actually says:
“These results would vary, of course, depending on exactly what kind of car you’re using and what kind of food you eat (or, if you’re going by pedicab, what kind of food your cabbie eats). Michael Bluejay, who’s done some number-crunching at BicycleUniverse.info, says that walking is actually worse than driving if you replace the calories with food in the standard American diet and if the car gets more than 24 miles per gallon.”
So it doesn’t necessarily have to be milk, it just has to be average american diet.
(This Mike actually refers to a book called “Diet for New America”, so I still haven’t seen the actual calculation.)
Human’s are artificially feeding cows, which obviously makes more of them than would have existed if we didn’t. The question is not how many there would be if humans didn’t exist, but how many there would be if we didn’t feed them and eat them.
Besides, just because nature does something, doesn’t mean that it’s “ok”.
It still looks like the calculation is made using the entire carbon footprint for everything involved in the production of milk/food, while comparing it to only the gas consumption of the car alone, without the carbon from the production of the car, extraction and transportation of the oil for the gas. Add to that the impact of making and maintaining the road, and the likelyhood that most Americans would probably drink that glass of milk when they got home whether they drove or walked. It’s very disengenuous.
If the point is supposed to be that your food has a surprisingly high carbon output, it’s true. The way it’s being presented it sounds like the completely incorrect idea that a Hummer is greener than a Prius.
From the evidence, you have started this thread entirely for the purpose of eliciting responses, without any intention from the outset of even discussing the information. While this is MPSIMS, it is still simply seeking something other than communication. I object to this practice and find it very unlikely that it is not done deliberately.