Nathanael Johnson at Grist has a piece on how to make meat greener. The answer: be efficient--two quotes.
The average dairy cow in California produces 20,000 pounds of milk a year. But the average dairy cow in Mexico produces only 4,000 pounds of milk a year, while in India it’s just 1,000 pounds.Interesting throughout. (Same piece as the previous post on salmon.)
The carbon footprint of American milk is 63 percent lower than in 1944, researchers have calculated.
In the 1950's I think we were doing good at about 12,000 pounds, which was well above average for the county.