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Page added on November 5, 2013

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We’re running out of water to grow food, Lester Brown warns


Forget peak oil. It’s peak water we should worry about, says Lester R. Brown.

“Water is far more important than oil,” according to the prolific author, founder of the Worldwatch Institute, and now president of the nonprofit Earth Policy Institute.

Brown, whose early warnings about the dangers of climate change and resource overuse have made him a respected elder of the environmental movement, focused on the looming water shortages while promoting his memoir, “Breaking New Ground: A Personal History,” the latest of his 50-plus books. He spoke Friday at the Harvard University Center for the Environment.

His point: It’s not that we will run out of water to drink; it’s that we won’t have enough to grow the food to feed the world.

“Water supply may be the principal constraint on the production of food. There’s a lot of land to produce food, if we have the water to go with it,” he said. “What happens to the water supply is going to affect the food supply and the world food prices.”

Overuse of water supplies already is driving aquifers to lower and lower levels around the world, he noted. The culprit is not simply personal use, Brown said. Some 80 percent of water is used for irrigation.

“We drink four liters of water a day, but we eat 2,000 liters of water per day” when the water used to produce our food is calculated, he said.

The situation is compounded by growing affluence in the world, which leads to higher meat consumption. It takes far more grain to feed animals for their meat than it would to feed humans directly.

“The average person in India consumes about 400 pounds of grain per year,” with minimal meat in their diet, he said. “In the United States, we consume 1,600 pounds per year,” most of it through meat, milk and eggs.

Growing the grain feed to produce those animal proteins is sucking dry the water supply in many parts of the world, he said. “I think food is the weak link in our system. If we look back at civilizations that failed, more likely than not, food was the weak link in their system. Despite the very sophisticated agricultural system in this country, I think it could be our weak link, too.”

More water-efficient agricultural practices are helping, but may not be enough, he said. Brown predicted farmers increasingly will turn to less water-hungry crops as supplies dwindle. They might switch, for example, from growing rice to wheat, which requires half the water. Such decisions already face farmers in the US Midwest, as the giant Ogallala Aquifer, which underlies eight states from Texas to South Dakota, has been dropping precipitously and may be depleted in a few decades.

Brown said the best strategy would be to reduce demand. “If I were to predict one single thing we could do to reduce water use, it would be to move down the grain food chain. We could cut our consumption in half and still have a healthy diet.”

7 Comments on "We’re running out of water to grow food, Lester Brown warns"

  1. action on Tue, 5th Nov 2013 11:58 pm 

    If we were to consider the threats, and our current method of living as spacial, or geometric, then the comfortable center of normality is being descended upon by chaos composing all angles, shortage of fresh water being one of them; and in fact contemporary normality is the generator, and gravitator of the chaos that looms.

  2. rollin on Wed, 6th Nov 2013 3:59 am 

    Amazing how the weeds, bushes and trees can grow under just natural rain conditions, but our crops need so much input.

  3. Kenz300 on Wed, 6th Nov 2013 7:16 am 

    Oil, coal and nuclear power plants require huge amounts of water to generate electricity. Hard to do in drought conditions and when water is being restricted.

    Wind and solar power plants require little or no water to generate electricity…..

    One more reason to switch to safe, clean alternative energy sources.

  4. Norm on Wed, 6th Nov 2013 9:37 am 

    Water the plants with Gatorade. It has electrolytes.

  5. Charlie Bucket on Wed, 6th Nov 2013 1:31 pm 

    @Norm – You mean “Brawndo”. I needed a good laugh this morning, thanks.

  6. rollin on Wed, 6th Nov 2013 3:03 pm 

    I am sure the agriculture pros can figure out ways to conserve water.

    The bigger problem will come when most of the aquifers are contaminated by fracking chemicals. Without filtration systems, the land and food will become saturated with a witches brew of chemicals.

  7. energyskeptic on Wed, 6th Nov 2013 7:21 pm 

    Behind every problem, oil lurks. Water is pumped, purified, and delivered by fossil fuel energy. As fossil fuel declines, that will be an additional factor in the disappearance of water. and the rare metals needed for “alternate tech” like windmills, solar, batteries (one of many reasons they can’t outlast oil).

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