The future of food

Seaweed harvesting in Bali. From seaweed to slime, algae is the future of food, says Professor Mark Edwards Photograph: Ed Wray/AP
Seaweed harvesting in Bali. From seaweed to slime, algae is the future of food, says Professor Mark Edwards Photograph: Ed Wray/AP


The Observer

(Saturday 21 January 2012)

By 2050 there will be another 2.5 billion people on the planet. How to feed them? Science's answer: a diet of algae, insects and meat grown in a lab

How can we feed the 2.5 billion more people – an extra China and India – likely to be alive in 2050? The UN says we will have to nearly double our food production and governments say we should adopt new technologies and avoid waste, but however you cut it, there are already one billion chronically hungry people, there's little more virgin land to open up, climate change will only make farming harder to grow food in most places, the oceans are overfished, and much of the world faces growing water shortages.

 

Fifty years ago, when the world's population was around half what it is now, the answer to looming famines was "the green revolution" – a massive increase in the use of hybrid seeds and chemical fertilisers. It worked, but at a great ecological price. We grow nearly twice as much food as we did just a generation ago, but we use three times as much water from rivers and underground supplies.

 

Food, farm and water technologists will have to find new ways to grow more crops in places that until now were hard or impossible to farm. It may need a total rethink over how we use land and water. So enter a new generation of radical farmers, novel foods and bright ideas.

Algae

How do you free up huge amounts of farmland to grow more food for humans? Easy – switch to commercial algae farms. Algae are simple, single-cell organisms that can grow very rapidly at sea, in polluted water and in places that would normally kill food crops. Major airlines and shipping companies are now investigating a switch to algae oil, and smart clean tech money is pouring in to the nascent technology.

 

The prize is huge: scientists say that under optimum conditions, commercial algae farms can produce 5,000-10,000 gallons of oil per acre, compared to just 350 gallons of ethanol biofuel per acre grown with crops like maize. In addition, algae could feed millions of animals and act as a fertiliser. Replacing all US ethanol (biofuel) production with algae oil would need around 2m acres of desert, but, says Arizona State university professor Mark Edwards, it would potentially allow 40m acres of cropland to be planted with human food, and save billions of gallons of irrigation water a year.

 

Algae are at the bottom of the food chain but they are already eaten widely in Japan and China in the form of seaweeds, and are used as fertilisers, soil conditioners and animal feed. "They range from giant seaweeds and kelps to microscopic slimes, they are capable of fixing CO2 in the atmosphere and providing fats, oils and sugars. They are eaten by everything from the tiniest shrimp to the great blue whales. They are the base of all life and must be the future," says Edwards.

Artificial meat

It looks like meat, feels like meat and it is meat, although it's never been near a living, breathing animal. Instead, artificial or "cultured" meat is grown from stem cells in giant vats.

 

Scientists say the hunt for meat substitutes is critical because western eating habits are now spreading to China and other rapidly emerging economies, putting intense pressure on governments and farmers to fell more forests and open up new farmland. Cattle now occupy nearly one quarter of all cultivable land, and growing crops for animal feed takes up another 25%. In the US, nearly 70% of the grain and cereals grown are now fed to farmed animals.

 

Much of the research into artificial meat is being done in Europe with scientists in Holland and Britain developing edible tissue grown from stem cells in laboratories. But while the first artificial hamburger could be developed next year, it might taste of nothing at all. Meat needs blood and fat to give it colour and taste, and while stem cells for blood and fat have been identified, this is slow, complex and expensive work.

 

Nevertheless, studies show that artificial meat wins hands down in the environmental stakes, using far less water, energy and land. In addition, few ethical objections have been raised, largely because mass production of animals in factory farms and use of growth hormones and antibiotics is already considered questionable.

New crops

Few people have heard of Zhikang Li, but history may judge the Chinese plant breeder to be one of the most important people of the century. Last year, after 12 years' work with the Chinese Academy of Agricultural Sciences and the International Rice Research Institute in the Philippines, he and his team developed "green super rice", a series of rice varieties which produce more grain but which have proved more resistant to droughts, floods, salty water, insects and disease .

 

Zhikang Li achieved this without GM technology, working instead with hundreds of researchers and farmers in 16 countries and using only conventional plant breeding techniques to cross-breed more than 250 rice varieties.

 

Green super rice, which could increase yields in Asia enough to feed an extra 100 million people, will be rolled out in the coming years. But better plant breeding – with or without GM – will be key to increasing the yields of all other crops.

 

However, most research money has gone into GM in the past 20 years. Here, the global agrichemical industry has promised new crops enriched with extra vitamins, enzymes or healthy fatty acids, as well as drought-tolerant corn, and crops that can save carbon emissions. But while it looks ahead to bananas that produce human vaccines, fish that mature more quickly and cows that are resistant to disease, its promise to feed the world has been patchy in terms of results.

 

Last year more than 350m acres – about 10% of global cultivated area, or the same area as Germany, France and the UK together – were planted with GM crops, but this mainly covered only three big foods – maize, oilseed rape and soya – most of which went to animal feed.

Desert greening

Much of the world is arid, with its only nearby water being the sea. So could a technology be found to green coastal deserts in places such as Chile, California, Peru and the Middle East using salt water?

 

Charlie Paton, a British inventor, has a vision of vast "seawater greenhouses" to grow food and generate power. The idea is simple: in the natural water cycle, seawater is heated by the sun, evaporates, cools to form clouds, and returns to earth as refreshing rain. It is more or less the same in Paton's structures. Here, hot desert air going into a greenhouse is first cooled and then humidified by seawater. This humid air nourishes crops growing inside and then passes through an evaporator. When it meets a series of tubes containing cool seawater, fresh water condenses and is then collected. And because the greenhouses produce more than five times the fresh water needed to water the plants, some of it can be released into the local environment to grow other plants.

Seawater greenhouses have been shown to work and this year a large-scale pilot project backed by the Norwegian government will be built near Aqaba in Jordan. The Sahara Forest project will combine different technologies to grow food and biofuel crops and be up and running by 2015.

 

But this is just one of many technologies being developed to enable food to be grown in unlikely places. One of the simplest, but most ambitious plans, may be the long-mooted Great Green Wall of Africa. This linear forest would be 15km wide and 7,775km long, and stretch from Senegal in the west to Djibouti in east Africa. It would, say the 11 countries through which it would pass, help to stop the southward spread of the Sahara, slow soil erosion and wind speeds, help rain water filter into the ground and create micro-climates to allow fruit, vegetables and other crops to be grown.

Insects

Locusts, grasshoppers, spiders, wasps, worms, ants and beetles are not on most European or US menus but at least 1,400 species are eaten across Africa, Latin America and Asia. Now, with rising food prices and worldwide land shortages, it could be just a matter of time before insect farms set up in Britain.

 

Not only are many bugs rich in protein, low in fat and cholesterol and high in calcium and iron, but insect farms need little space. Environmentally, they beat conventional farms, too. The creatures are far better at converting plant biomass into edible meat than even our fastest growing livestock, they emit fewer greenhouse gases and they can thrive on paper, algae and the industrial wastes that would normally be thrown away.

 

The advantages of "micro-livestock" farming are great, say the UN and EU, both of which are keen to see if insect rearing could be greatly expanded. The Dutch government is studying how to set up insect farms. But aware of western squeamishness, they have asked researchers to see if they can just extract the protein that many bugs contain.

Meanwhile the EU is offering its member states $3m to promote the use of insects in cooking, and has asked food standards watchdogs to investigate their potential to supplement diets.

Write a comment

Comments: 4
  • #1

    Tdi (Wednesday, 04 July 2012 14:18)

    will return soon

  • #2

    language-english (Thursday, 05 July 2012)

    Hope you return and add your thoughts too, Tdi

  • #3

    rational oven (Monday, 05 November 2012 01:38)

    Keep it up; keep posting more n more n more.

  • #4

    anonse towarzyskie (Tuesday, 17 January 2017 21:02)

    modrzew

Fri

13

Nov

2015

Are Languages Products of their Environment?


shutterstock_222422665_151112


DISCOVER MAGAZINE published this very interesting article: 


  Languages Are Products of Their Environments


The characteristics that make each language unique may actually be adaptations to the acoustics of different environments.

2 Comments

Tue

03

Jun

2014

The Case for Reparations

 

The Case for Reparations

 

Two hundred fifty years of slavery. Ninety years of Jim Crow. Sixty years of separate but equal. Thirty-five years of racist housing policy. Until we reckon with our compounding moral debts, America will never be whole.

 

By Ta-Nehisi Coates

May 21, 2014

 


Chapters

  1. I. “So That’s Just One Of My Losses”
  2. II.  “A Difference of Kind, Not Degree”
  3. III. “We Inherit Our Ample Patrimony”
  4. IV. “The Ills That Slavery Frees Us From”
  5. V. The Quiet Plunder
  6. VI. Making The Second Ghetto
  7. VII. “A Lot Of People Fell By The Way”
  8. VIII. “Negro Poverty is not White Poverty”
  9. IX. Toward A New Country
  10. X. “There Will Be No ‘Reparations’ From Germany”
0 Comments

Mon

02

Jun

2014

A Look At 19th Century Children In The USA

PHILADELPHIA — DINNER with your children in 19th-century America often required some self-control. Berry stains in your daughter’s hair? Good for her. Raccoon bites running up your boy’s arms? Bet he had an interesting day.

 

As this year’s summer vacation begins, many parents contemplate how to rein in their kids. But there was a time when Americans pushed in the opposite direction, preserved in Mark Twain’s cat-swinging scamps. Parents back then encouraged kids to get some wildness out of their system, to express the republic’s revolutionary values.

The New York Times

Sunday Review

By JON GRINSPAN MAY 31, 2014

 

A late 19th century family taking a stroll down a set of railroad tracks
A late 19th century family taking a stroll down a set of railroad tracks

American children of the 19th century had a reputation. Returning British visitors reported on American kids who showed no respect, who swore and fought, who appeared — at age 10 — “calling for liquor at the bar, or puffing a cigar in the streets,” as one wrote. There were really no children in 19th-century America, travelers often claimed, only “small stuck-up caricatures of men and women.”

 

This was not a “carefree” nation, too rough-hewed to teach proper manners; adults deliberately chose to express new values by raising “go-ahead” boys and girls. The result mixed democracy and mob rule, assertiveness and cruelty, sudden freedom and strict boundaries. Visitors noted how American fathers would brag that their disobedient children were actually “young republicans,” liberated from old hierarchies. Children were still expected to be deferential to elders, but many were trained to embody their nation’s revolutionary virtues. “The theory of the equality” was present at the ballot box, according to one sympathetic Englishman, but “rampant in the nursery.”

 

Boys, in particular, spent their childhoods in a rowdy outdoor subculture. After age 5 or so they needed little attention from their mothers, but were not big enough to help their fathers work. So until age 10 or 12 they spent much of their time playing or fighting.

 

The writer William Dean Howells recalled his ordinary, violent Ohio childhood, immersed in his loose gang of pals, rarely catching a “glimpse of life much higher than the middle of a man.” Howells’s peers were “always stoning something,” whether friends, rivals or stray dogs. They left a trail of maimed animals behind them, often hurt in sloppy attempts to domesticate wild pets.

 

And though we envision innocents playing with a hoop and a stick, many preferred “mumbletypeg” — a game where two players competed to see who could throw a knife closer to his own foot. Stabbing yourself meant a win by default.

 

Left to their own devices, boys learned an assertive style that shaped their futures. The story of every 19th-century empire builder — Carnegie, Rockefeller, Vanderbilt — seems to begin with a striving 10-year-old. “Boy culture” offered training for the challenges of American manhood and a reprieve before a life of labor.

 

But these unsupervised boys also formed gangs that harassed the mentally ill, the handicapped and racial and ethnic minorities. Boys played an outsize role in the anti-Irish pogroms in 1840s Philadelphia, the brutal New York City draft riots targeting African-Americans during the Civil War and attacks on Chinese laborers in Gilded Age California. These children did not invent the bigotry rampant in white America, but their unrestrained upbringing let them enact what their parents mostly muttered.

 

Their sisters followed a different path. Girls were usually assigned more of their mothers’ tasks. An 8-year-old girl would be expected to help with the wash or other physically demanding tasks, while her brother might simply be too small, too slow or too annoying to drive the plow with his father. But despite their drudgery, 19th-century American girls still found time for tree climbing, bonfire building and waterfall-jumping antics. There were few pretty pink princesses in 19th-century America: Girls were too rowdy and too republican for that.

 

So how did we get from “democratic sucklings” to helicopter parents? Though many point to a rise of parental worrying after the 1970s, this was an incremental change in a movement that began a hundred years earlier.

 

In the last quarter of the 19th century, middle-class parents launched a self-conscious project to protect children. Urban professionals began to focus on children’s vulnerabilities. Well-to-do worriers no longer needed to raise tough dairymaids or cunning newsboys; the changing economy demanded careful managers of businesses or households, and restrained company men, capable of navigating big institutions.

 

Demographics played a role as well: By 1900 American women had half as many children as they did in 1800, and those children were twice as likely to live through infancy as they were in 1850. Ironically, as their children faced fewer dangers, parents worried more about their protection.

 

Instead of seeing boys and girls as capable, clever, knockabout scamps, many reconceived children as vulnerable, weak and naïve. Reformers introduced child labor laws, divided kids by age in school and monitored their play. Jane Addams particularly worked to fit children into the new industrial order, condemning “this stupid experiment of organizing work and failing to organize play.”

 

There was good reason to tame the boys and girls of the 19th century, if only for stray cats’ sake. But somewhere between Jane Addams and Nancy Grace, Americans lost track of their larger goal. Earlier parents raised their kids to express values their society trumpeted.

 

“Precocious” 19th-century troublemakers asserted their parents’ democratic beliefs and fit into an economy that had little use for 8-year-olds but idealized striving, self-made men. Reformers designed their Boy Scouts to meet the demands of the 20th century, teaching organization and rebalancing the relationship between play and work. Both movements agreed, in their didactic ways, that playtime shaped future citizens.

 

Does the overprotected child articulate values we are proud of in 2014? Nothing is easier than judging other peoples’ parenting, but there is a side of contemporary American culture — fearful, litigious, controlling — that we do not brag about but that we reveal in our child rearing, and that runs contrary to our self-image as an open, optimistic nation. Maybe this is why sheltering parents come in for so much easy criticism: A visit to the playground exposes traits we would rather not recognize.

 

There is, however, a saving grace that parents will notice this summer. Kids are harder to guide and shape, as William Dean Howells put it, “than grown people are apt to think.” It is as true today as it was two centuries ago: “Everywhere and always the world of boys is outside of the laws that govern grown-up communities.” Somehow, they’ll manage to go their own way.

 

________________________________

 

A National Endowment for the Humanities fellow at the Massachusetts Historical Society who is writing a book on the role of young people in 19th-century American democracy.

0 Comments

Mon

21

Apr

2014

Investigating Family's Wealth, China's Leader Signals a Change

From The New York Times 

By CHRISTOPHER DREW and JAD MOUAWAD

APRIL 19, 2014

 

HONG KONG — His son landed contracts to sell equipment to state oil fields and thousands of filling stations across China. His son’s mother-in-law held stakes in pipelines and natural gas pumps from Sichuan Province in the west to the southern isle of Hainan. And his sister-in-law, working from one of Beijing’s most prestigious office buildings, invested in mines, property and energy projects.

 

In thousands of pages of corporate documents describing these ventures, the name that never appears is his own: Zhou Yongkang, the formidable Chinese Communist Party leader who served as China’s top security official and the de facto boss of its oil industry.





A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China.  Intrigue surrounds the family after a spate of arrests.  Sim Chi Yim for the New York Times
A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China. Intrigue surrounds the family after a spate of arrests. Sim Chi Yim for the New York Times

But President Xi Jinping has targeted Mr. Zhou in an extraordinary corruption inquiry, a first for a Chinese party leader of Mr. Zhou’s rank, and put his family’s extensive business interests in the cross hairs.

 

Even by the cutthroat standards of Chinese politics, it is a bold maneuver. The finances of the families of senior leaders are among the deepest and most politically delicate secrets in China. The party has for years followed a tacit rule that relatives of the elite could prosper from the country’s economic opening, which rewarded loyalty and helped avert rifts in the leadership.

Zhou Family Ties

1 Comments

Fri

13

Nov

2015

Are Languages Products of their Environment?


shutterstock_222422665_151112


DISCOVER MAGAZINE published this very interesting article: 


  Languages Are Products of Their Environments


The characteristics that make each language unique may actually be adaptations to the acoustics of different environments.

2 Comments

Tue

03

Jun

2014

The Case for Reparations

 

The Case for Reparations

 

Two hundred fifty years of slavery. Ninety years of Jim Crow. Sixty years of separate but equal. Thirty-five years of racist housing policy. Until we reckon with our compounding moral debts, America will never be whole.

 

By Ta-Nehisi Coates

May 21, 2014

 


Chapters

  1. I. “So That’s Just One Of My Losses”
  2. II.  “A Difference of Kind, Not Degree”
  3. III. “We Inherit Our Ample Patrimony”
  4. IV. “The Ills That Slavery Frees Us From”
  5. V. The Quiet Plunder
  6. VI. Making The Second Ghetto
  7. VII. “A Lot Of People Fell By The Way”
  8. VIII. “Negro Poverty is not White Poverty”
  9. IX. Toward A New Country
  10. X. “There Will Be No ‘Reparations’ From Germany”
0 Comments

Mon

02

Jun

2014

A Look At 19th Century Children In The USA

PHILADELPHIA — DINNER with your children in 19th-century America often required some self-control. Berry stains in your daughter’s hair? Good for her. Raccoon bites running up your boy’s arms? Bet he had an interesting day.

 

As this year’s summer vacation begins, many parents contemplate how to rein in their kids. But there was a time when Americans pushed in the opposite direction, preserved in Mark Twain’s cat-swinging scamps. Parents back then encouraged kids to get some wildness out of their system, to express the republic’s revolutionary values.

The New York Times

Sunday Review

By JON GRINSPAN MAY 31, 2014

 

A late 19th century family taking a stroll down a set of railroad tracks
A late 19th century family taking a stroll down a set of railroad tracks

Read More 0 Comments

Mon

21

Apr

2014

Investigating Family's Wealth, China's Leader Signals a Change

From The New York Times 

By CHRISTOPHER DREW and JAD MOUAWAD

APRIL 19, 2014

 

HONG KONG — His son landed contracts to sell equipment to state oil fields and thousands of filling stations across China. His son’s mother-in-law held stakes in pipelines and natural gas pumps from Sichuan Province in the west to the southern isle of Hainan. And his sister-in-law, working from one of Beijing’s most prestigious office buildings, invested in mines, property and energy projects.

 

In thousands of pages of corporate documents describing these ventures, the name that never appears is his own: Zhou Yongkang, the formidable Chinese Communist Party leader who served as China’s top security official and the de facto boss of its oil industry.





A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China.  Intrigue surrounds the family after a spate of arrests.  Sim Chi Yim for the New York Times
A visitor at the Zhou family's ancestral graves in Xiqliantou, eastern China. Intrigue surrounds the family after a spate of arrests. Sim Chi Yim for the New York Times

Read More 1 Comments