AMERICANS WILL ALL EAT LESS MEAT SOON... NO MATTER WHAT

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The great bulk of American beef comes from cows that have been fattened in confined yards with thousands of of their peers, munching a diet of corn, soybeans, and chemical additives.  Should the feedlot model, innovated in the United States in the middle of the 20th century, continue its global spread—or is it better to raise cows on pasture, eating grass?
The question is critical, because global demand for animal flesh is on the rise, driven by growing appetites for meat in developing countries, where per capita meat consumption stands at about a third of developed-world levels.
In a much-shared interview on the website of the Breakthrough Institute, Washington State University researcher Judith Capper informs us that the US status quo is the way forward. "If we switched to all grass-fed beef in the United States, it would require an additional 64.6 million cows, 131 million acres more land, and 135 million more tonnes of greenhouse gas emissions," she said. "We’d have the same amount of beef, but with a huge environmental cost."....
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....The answer, plainly, is no, according to the eminent ecologist Vaclav Smil in a 2014 paper. Smil notes that global meat production has risen from less than 55 million tons in 1950 to more than 300 million tons in 2010—a nearly six-fold increase in 60 years. "But this has been a rather costly achievement because mass-scale meat production is one of the most environmentally burdensome activities," he writes, and then proceeds to list off the problems: it requires a large-scale shift from diversified farmland and rainforests to "monocultures of animal feed," which triggered massive soil erosion, carbon emissions, and coastal "dead zones" fed by fertilizer runoff. Also, concentrating animals tightly together produces "huge volumes of waste," more than can be recycled into nearby farmland, creating noxious air and water pollution. Moreover, it's "inherently inefficient" to feed edible grains to farm animals, when we could just eat the grain, Smil adds.