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Meat Makes Our Planet Thirsty
Hugh Pickens DOT Com writes "Mames McWilliams writes in the NYT that with California experiencing one of its worst droughts on record, attention has naturally focused on the water required to grow popular foods such as walnuts, broccoli, lettuce, tomatoes, strawberries, almonds and grapes. 'Who knew, for example, that it took 5.4 gallons to produce a head of broccoli, or 3.3 gallons to grow a single tomato? This information about the water footprint of food products — that is, the amount of water required to produce them — is important to understand, especially for a state that dedicates about 80 percent of its water to agriculture.' But for those truly interested in lowering their water footprint, those numbers pale next to the water required to fatten livestock. Beef turns out to have an overall water footprint of roughly four million gallons per ton produced (PDF). By contrast, the water footprint for "sugar crops" like sugar beets is about 52,000 gallons per ton; for vegetables it's 85,000 gallons per ton; and for starchy roots it's about 102,200 gallons per ton.
There's also one single plant that's leading California's water consumption and it's one that's not generally cultivated for humans: alfalfa. Grown on over a million acres in California, alfalfa sucks up more water than any other crop in the state. And it has one primary destination: cattle. 'If Californians were eating all the beef they produced, one might write off alfalfa's water footprint as the cost of nurturing local food systems. But that's not what's happening. Californians are sending their alfalfa, and thus their water, to Asia.' Alfalfa growers are now exporting some 100 billion gallons of water a year from this drought-ridden region to the other side of the world in the form of alfalfa.
Beef eaters are already paying more. Water-starved ranches are devoid of natural grasses that cattle need to fatten up so ranchers have been buying supplemental feed at escalating prices or thinning their herds to stretch their feed dollars. But McWilliams says that in the case of agriculture and drought, there's a clear and accessible actions most citizens can take: Changing one's diet to replace 50 percent of animal products with edible plants like legumes, nuts and tubers results in a 30 percent reduction in an individual's food-related water footprint. Going vegetarian reduces that water footprint by almost 60 percent. 'It's seductive to think that we can continue along our carnivorous route, even in this era of climate instability. The environmental impact of cattle in California, however, reminds us how mistaken this idea is coming to seem.'"
There's also one single plant that's leading California's water consumption and it's one that's not generally cultivated for humans: alfalfa. Grown on over a million acres in California, alfalfa sucks up more water than any other crop in the state. And it has one primary destination: cattle. 'If Californians were eating all the beef they produced, one might write off alfalfa's water footprint as the cost of nurturing local food systems. But that's not what's happening. Californians are sending their alfalfa, and thus their water, to Asia.' Alfalfa growers are now exporting some 100 billion gallons of water a year from this drought-ridden region to the other side of the world in the form of alfalfa.
Beef eaters are already paying more. Water-starved ranches are devoid of natural grasses that cattle need to fatten up so ranchers have been buying supplemental feed at escalating prices or thinning their herds to stretch their feed dollars. But McWilliams says that in the case of agriculture and drought, there's a clear and accessible actions most citizens can take: Changing one's diet to replace 50 percent of animal products with edible plants like legumes, nuts and tubers results in a 30 percent reduction in an individual's food-related water footprint. Going vegetarian reduces that water footprint by almost 60 percent. 'It's seductive to think that we can continue along our carnivorous route, even in this era of climate instability. The environmental impact of cattle in California, however, reminds us how mistaken this idea is coming to seem.'"
Alfalfa is used to feed dairy cattle that produce ... dairy ... used to make cheese, yogurt and other products. Alfalfa is not fed to beef cattle.
Land Mammals
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now exporting some 100 billion gallons of water a year
Can someone explain to me how this sentence even makes sense? It seems to imply that the sate is somehow losing water forever by shipping it abroad. But when the water is consumed, whether in China or California, it will eventually make its way back out into the Pacific Ocean, which is the ultimate source for all of California's water. So once the water is used to grow a crop, for the purpose of California's future wetness, it doesn't really matter one iota where the crop ultimately gets consumed.
Water table depletion is directly analogous to exhausting an oil or coal resource; you'll get the atoms back in there, but not on the same timescale you took them out.
No kidding!!! What do you say at this point?
Not true.
What do you think Silicon Valley and the surrounding areas were before HP, et al took up shop?
Farms, orchards and ranches. And this was before the 1950's.
From Salinas, Watsonville, over the hill to Los Gatos, all of the Santa Clara valley, up the peninsula, across the bay, up in the north bay...
Tons of food was grown and rasied around the bay area before it turned into a hipster billionaires playground. Hell, there may still be some orchards hiding in Los Altos...
I think you are talking about southern California, which is a desert.
The Mediterranean Climate areas of the state, and especially the bay area and areas north were extremely fruitful and supported the largest numbers of native Americans on the continent before Europeans arrived.
We play the game with the bravery of being out of range
Missing from the vegetarian fear fest is that meat has ten times the caloric value of vegetables. For example, the 100 calories achieved with 1.2 ounces of porterhouse steak requires eating more than 12 ounces of Broccoli. . That ten-fold higher mass also has an even higher bulk, since vegetables are much less dense than meat. That means ten times the cost, at least, to ship the same caloric content as vegetables compared to meat.
Of course we need vegetables too, for vitamins and minerals, as part of a balanced diet. But meat has high value as a compact source of calories required for daily life. As far as water usage goes, the California drought is temporary. There is no scientific evidence that the intensity or frequency of drought in the western U.S. is increasing (). All that is required is managing agricultural cycles to accommodate dry periods. When you interfere with that management, for instance by blocking water supplies to agriculture to protect delta smelt, then drought can get the upper hand. That's what's happening today in California.
Average age of slaughter for cattle is 18 to 24 months depending on who you ask (http://wiki.answers.com/Q/What_is_the_best_age_for_beef_slaughter?#slide=2), and the average consumption of water for dry cattle is 38 L/day (http://www.omafra.gov.on.ca/english/engineer/facts/07-023.htm#2). Take the maximum of 24 months you get: 38 L x 365 days in a year x 2 = 27,740 litres. Which is approx. 7,328 gallons. 1 ton is approx. 2,000 pounds...average weight for cattle at slaughter is around 1,400 pounds (http://wiki.answers.com/Q/What_is_the_slaughter_weight_for_a_cow?#slide=6), so that would be 7,328 gallons x 2 = 14,626 gallons of water.
The article says it takes 145,000 gallons of water. I'd like to see the author's source material.
But either way, it's nice to see that the author is not pushing his vegan agenda (http://en.wikipedia.org/wiki/James_E._McWilliams).