The Need for a New Economic System – PART VII: The Global Food Crisis

Human Wrongs Watch

By John Scales Avery*

20 August 2015

Optimum population in the long-term future

What is the optimum population of the world? It is certainly not the maximum number that can be squeezed onto the globe by eradicating every species of plant and animal that cannot be eaten. The optimum global population is one that can be supported in comfort, equality and dignity – and with respect for the environment.


In 1848 (when there were just over one billion people in the world), John Stuart Mill described the optimal global population in the following words:

“The density of population necessary to enable mankind to obtain, in the greatest degree, all the advantages of cooperation and social intercourse, has, in the most populous countries, been attained. A population may be too crowded, although all be amply supplied with food and raiment…”

“… If the earth must lose that great portion of its pleasantness which it owes to things that the unlimited increase of wealth and population would extirpate from it, for the mere purpose of enabling it to support a larger, but not better or happier population, I sincerely hope, for the sake of posterity, that they will be content to be stationary, long before necessity compels them to it.” John Stuart Mill, “Principles of Political Economy, With Some of Their Applications to Social Philosophy”, (1848).


“… Nor is there much satisfaction in contemplating the world with nothing left to the spontaneous activity of nature; with every rood of land brought into cultivation, which is capable of growing food for human beings; every flowery waste or natural pasture plowed up, all quadrupeds or birds which are not domesticated for man’s use exterminated as his rivals for food, every hedgerow or superfluous tree rooted out, and scarcely a place left where a wild shrub or flower could grow without being eradicated as a weed in the name of improved agriculture…

Has the number of humans in the world already exceeded the earth’s sustainable limits? Will the global population of humans crash catastrophically after having exceeded the carrying capacity of the environment?

There is certainly a danger that this will happen, a danger that the 21st century will bring very large scale famines to vulnerable parts of the world, because modern energy-intensive agriculture will be dealt a severe blow by the end of the fossil fuel era, and because climate change will reduce the world’s agricultural output.

When the major glaciers in the Himalayas have melted, they will no longer be able to give India and China summer water supplies; rising oceans will drown much agricultural land; and aridity will reduce the output of many regions that now produce much of the world’s grain.

Falling water tables in overdrawn aquifers, and loss of topsoil will add to the problem. We should be aware of the threat of a serious global food crisis in the 21st century if we are to have a chance of avoiding it.

The term ecological footprint was introduced by William Rees and Mathis Wackernagel in the early 1990’s to compare demands on the environment with the earth’s capacity to regenerate. In 2015, humanity used environmental resources at such a rate that it would take 1.6 earths to renew them.

In other words, we have already exceeded the earth’s carrying capacity. Since eliminating the poverty that characterizes much of the world today will require more resources per capita, rather than less. it seems likely that in the era beyond fossil fuels, the optimum global population will be considerably less than the present population of the world.

Limitations on cropland

In 1944 the Norwegian-American plant geneticist Norman Borlaug was sent to Mexico by the Rockefeller Foundation to try to produce new wheat varieties that might increase Mexico’s agricultural output. Borlaug’s dedicated work on this project was spectacularly successful.

He remained with the project for 16 years, and his group made 6,000 individual crossings of wheat varieties to produce high-yield disease-resistant strains.

Norman Borlaug and agronomist George Harrer in 1943.

Norman Borlaug and agronomist George Harrer in 1943.

In 1963, Borlaug visited India, bringing with him 100 kg. of seeds from each of his most promising wheat strains. After testing these strains in Asia, he imported 450 tons of the Lerma Rojo and Sonora 64 varieties: 250 tons for Pakistan and 200 for India.

By 1968, the success of these varieties was so great that school buildings had to be commandeered to store the output. Borlaug’s work began to be called a “Green Revolution”.

In India, the research on high-yield crops was continued and expanded by Prof. M.S. Swaminathan and his coworkers. The work of Green Revolution scientists, such Norman Borlaug and M.S. Swaminathan, has been credited with saving the lives of as many as a billion people.

Despite these successes, Borlaug believes that the problem of population growth is still a serious one.

“Africa and the former Soviet republics”, Borlaug states, “and the Cerrado, are the last frontiers. After they are in use, the world will have no additional sizable blocks of arable land left to put into production, unless you are willing to level whole forests, which you should not do…

“…So, future food-production increases will have to come from higher yields. And though I have no doubt that yields will keep going up, whether they can go up enough to feed the population monster is another matter. Unless progress with agricultural yields remains very strong, the next century will experience human misery that, on a sheer numerical scale, will exceed the worst of everything that has come before.”

With regard to the prospect of increasing the area of cropland, a report by the United Nations Food and Agricultural Organization (Provisional Indicative World Plan for Agricultural Development, FAO, Rome, 1970) states that “In Southern Asia,… in some countries of Eastern Asia, in the Near East and North Africa… there is almost no scope for expanding agricultural area… In the drier regions, it will even be necessary to return to permanent pasture the land that is marginal and submarginal for cultivation. In most of Latin America and Africa south of the Sahara, there are still considerable possibilities for expanding cultivated areas; but the costs of development are high, and it will often be more economical to intensify the utilization of areas already settled.”

Thus there is a possibility of increasing the area of cropland in Africa south of the Sahara and in Latin America, but only at the cost of heavy investment and at the additional cost of destruction of tropical rain forests.

Rather than an increase in the global area of cropland, we may encounter a future loss of cropland through soil erosion, salination, desertification, loss of topsoil, depletion of minerals in topsoil, urbanization and failure of water supplies.

In China and in the southwestern part of the United States, water tables are falling at an alarming rate. The Ogallala aquifer (which supplies water to many of the plains states in the central and southern parts of the United States) has a yearly overdraft of 160%.

In the 1950’s, both the U.S.S.R and Turkey attempted to convert arid grasslands into wheat farms. In both cases, the attempts were defeated by drought and wind erosion, just as the wheat farms of Oklahoma were overcome by drought and dust in the 1930’s. If irrigation of arid lands is not performed with care, salt may be deposited, so that the land is ruined for agriculture.

This type of desertification can be seen, for example, in some parts of Pakistan. Another type of desertification can be seen in the Sahel region of Africa, south of the Sahara. Rapid population growth in the Sahel has led to overgrazing, destruction of trees, and wind erosion, so that the land has become unable to support even its original population.


This graph shows the total world production of coarse grain between 1960 and 2004. Because of high-yield varieties, the yield of grain increased greatly. Notice, however, that the land under cultivation remained almost constant. High-yield agriculture depends on large inputs of fossil fuel energy and irrigation, and may be dificult to maintain in the future.

Especially worrying is a prediction of the International Panel on Climate Change concerning the effect of global warming on the availability of water.

According to Model A1 of the IPCC, global warming may, by the 2050’s, have reduced by as much as 30 percent the water available in large areas of world that now a large producers of grain.

Professor M.S. Swaminathan, father of the Green Revolution in India.

Professor M.S. Swaminathan, father of the Green Revolution in India.

Added to the agricultural and environmental problems, are problems of finance and distribution.

Famines can occur even when grain is available somewhere in the world, because those who are threatened with starvation may not be able to pay for the grain, or for its transportation.

The economic laws of supply and demand are not able to solve this type of problem.

One says that there is no “demand” for the food (meaning demand in the economic sense), even though people are in fact starving.


Energy-dependence of modern agriculture

A very serious problem with Green Revolution plant varieties is that they require heavy inputs of pesticides, fertilizers and irrigation. Because of this, the use of high-yield varieties contributes to social inequality, since only rich farmers can afford the necessary inputs.

Monocultures, such as the Green Revolution varieties may also prove to be vulnerable to future epidemics of plant diseases, such as the epidemic that caused the Irish Potato Famine in 1845.

Even more importantly, pesticides, fertilizers and irrigation all depend on the use of fossil fuels. One must therefore ask whether high agricultural yields can be maintained in the future, when fossil fuels are expected to become prohibitively scarce and expensive.


Modern agriculture has become highly dependent on fossil fuels, especially on petroleum and natural gas. This is especially true of production of the high-yield grain varieties introduced in the Green Revolution, since these require especially large inputs of fertilizers, pesticides and irrigation.

Today, fertilizers are produced using oil and natural gas, while pesticides are synthesized from petroleum feedstocks, and irrigation is driven by fossil fuel energy. Thus agriculture in the developed countries has become a process where inputs of fossil fuel energy are converted into food calories.

The ratio of the fossil fuel energy inputs to the food calorie outputs depends on how many energy-using elements of food production are included in the accounting.

David Pimental and Mario Giampietro of Cornell University estimated in 1994 that U.S. agriculture required 0.7 kcal of fossil fuel energy inputs to produce 1.0 kcal of food energy.

However, this figure was based on U.N. statistics that did not include fertilizer feedstocks, pesticide feed-stocks, energy and machinery for drying crops, or electricity, construction and maintenance of farm buildings.

A more accurate calculation, including these inputs, gives an input/output ratio of approximately 1.0. Finally, if the energy expended on transportation, packaging and retailing of food is included, Pimental and Giampietro found that the input/output ratio for the U.S. food system was approximately 10, and this figure did not include energy used for cooking.

The Brundtland Report’s estimate of the global potential for food production assumes “that the area under food production can be around 1.5 billion hectares (3.7 billion acres – close to the present level), and that the average yields could go up to 5 tons of grain equivalent per hectare (as against the present average of 2 tons of grain equivalent).”

In other words, the Brundtland Report assumes an increase in yields by a factor of 2.5.

This would perhaps be possible if traditional agriculture could everywhere be replaced by energy-intensive modern agriculture using Green Revolution plant varieties. However, Pimental and Giampietro’s studies show that modern energy-intensive agricultural techniques cannot be maintained after fossil fuels have been exhausted or after their use has been discontinued to avoid catastrophic climate change.

At the time when the Brundtland Report was written (1987), the global average of 2 tons of grain equivalent per hectare included much higher yields from the sector using modern agricultural methods. Since energy-intensive petroleum-based agriculture cannot be continued in the post-fossil-fuel era, future average crop yields will probably be much less than 2 tons of grain equivalent per hectare.

The 1987 global population was approximately 5 billion. This populationwas supported by 3 billion tons of grain equivalent per year.

After fossilfuels have been exhausted, the total world agricultural output is likely to be considerably less than that, and therefore the population that it will be The population which will be possible to support sustainably will probably be considerably less than 5 billion, assuming that our average daily per capita use of food calories remains the same, and assuming that the amount of cropland and pasturage remains the same (1.5 billion hectares cropland, 3.0 billion hectares pasturage).

The Brundtland Report points out that “The present (1987) global average consumption of plant energy for food, seed and animal feed amounts to 6,000 calories daily, with a range among countries of 3,000-15,000 calories, depending on the level of meat consumption.”

Thus there is a certain flexibility in the global population that can survive on a given total agricultural output. If the rich countries were willing to eat less meat, more people could be supported.

Source: FAO

Climate change adds another challenge to food and agriculture systems. It poses a fundamental threat to global food security, sustainable development and poverty eradication.| FAO

Effects of climate change on agriculture

  1. a) The effect of temperature increase

There is a danger that when climate change causes both temperature increases and increased aridity in regions like the US grain belt, yields will be very much lowered.

Of the three main grain types (corn, wheat and rice) corn is the most vulnerable to the direct effect of increases in temperature. One reason for this is the mechanism of pollination of corn: A pollen grain lands on one end of a corn-silk strand, and the germ cell must travel the length of the strand in order to fertilize the kernel.

At high temperatures, the corn silk becomes dried out and withered, and is unable to fulfill its biological function. Furthermore, heat can cause the pores on the underside ofthe corn leaf to close, so that photosynthesis stops.

According to a study made by Mohan Wali and coworkers at Ohio State University, the photosynthetic activity of corn increases until the temperature reaches 20 degrees Celsius. It then remains constant until the temperature reaches 35 degrees, after which it declines. At 40 degrees and above, photosynthesis stops altogether.

Scientists in the Phillipines report that the pollination of rice fails entirely at 40 degrees Celsius, leading to crop failures. Wheat yields are also markedly reduced by temperatures in this range.

  1. b) The effect of decreased rainfall

According to the Stern Report, some of the major grain-producing areas of the world might loose up to 30 percent of their rainfall by 2050. These regions include much of the United States, Brazil, the Mediterranean region, Eastern Russia and Belarus, the Middle East, Southern Africa and Australia.

Of course possibilities for agriculture may simultaneously increase in other regions, but the net effect of climate change on the world’s food supply is predicted to be markedly negative.

  1. c) Unsustainable use of groundwater

It may seem surprising that fresh water can be regarded as a non-renewable resource. However, groundwater in deep aquifers is often renewed very slowly.

**Image: Foresight 2015: Water stress and water scarcity (25 countries) by United Nations (UN post GEO2000) | Author: Lamiot | Wikimedia Commons

**Foresight 2015: Water stress and water scarcity (25 countries) by United Nations (UN post GEO2000) | Author: Lamiot | Wikimedia Commons

Sometimes renewal requires several thousand years. When the rate of withdrawal of groundwater exceeds the rate of renewal, the carrying capacity of the resource has been exceeded, and withdrawal of water becomes analogous to mining a mineral. However, it is more serious than ordinary mining because water is such a necessary support for life.

In many regions of the world today, groundwater is being withdrawn faster than it can be replenished, and important aquifers are being depleted. In China, for example, groundwater levels are falling at an alarming rate.

Considerations of water supply in relation to population form the background for China’s stringent population policy. At a recent lecture, Lester Brown of the Worldwatch Institute was asked by a member of the audience to name the resource for which shortages would most quickly become acute. Most of the audience expected him to name oil, but instead he replied “water”.

Lester Brown then cited China’s falling water table. He predicted that within decades, China would be unable to feed itself. He said that this would not cause hunger in China itself: Because of the strength of China’s economy, the country would be able to purchase grain on the world market.

However Chinese purchases of grain would raise the price, and put world grain out of reach of poor countries in Africa. Thus water shortages in China will produce famine in parts of Africa, Brown predicted.

Under many desert areas of the world are deeply buried water tables formed during glacial periods when the climate of these regions was wetter. These regions include the Middle East and large parts of Africa. Water can be withdrawn from such ancient reservoirs by deep wells and pumping, but only for a limited amount of time.

In oil-rich Saudi Arabia, petroenergy is used to drill wells for ancient water and to bring it to the surface. Much of this water is used to irrigate wheat fields, and this is done to such an extent that Saudi Arabia exports wheat. The country is, in effect, exporting its ancient heritage of water, a policy that it may, in time, regret.

A similarly short-sighted project is Muammar Qaddafi’s enormous pipeline, which will bring water from ancient sub-desert reservoirs to coastal cities of Libya.

In the United States, the great Ogallala aquifer is being overdrawn. This aquifer is an enormous stratum of water-saturated sand and gravel under-lying parts of northern Texas, Oklahoma, New Mexico, Kansas, Colorado, Nebraska, Wyoming and South Dakota. The average thickness of the aquifer is about 70 meters. The rate of water withdrawal from the aquifer exceeds the rate of recharge by a factor of eight.

Thus we can see that in many regions, the earth’s present population is living on its inheritance of water, rather than its income. This fact, coupled with rapidly increasing populations and climate change, may contribute to a very serious food crisis partway through the 21st century.

  1. d) Glacial melting and summer water supplies

The summer water supplies of both China and India are threatened by the melting of glaciers.

The Gangotri glacier, which is the principle glacier feeding India’s great Ganges River, is reported to be melting at an accelerating rate, and it could disappear within a few decades. If this happens,the Ganges could become seasonal, flowing only during the monsoon season.

Chinese agriculture is also threatened by disappearing Himalayan glaciers, in this case those on the Tibet-Quinghai Plateau. The respected Chinese glaciologist Yao Tandong estimates that the glaciers feeding the Yangtze and Yellow Rivers are disappearing at the rate of 7% per year.

The Indus and Mekong Rivers will be similarly affected by the melting of glaciers. Lack of water during the summer season could have a serious impact on the irrigation of rice and wheat fields.

Forest loss and climate change Mature forests contain vast amounts of sequestered carbon, not only in their trees, but also in the carbon-rich soil of the forest floor. When a forest is logged or burned to make way for agriculture, this carbon is released into the atmosphere.

Whitechuck Glacier in the North Cascades National Park in 1973.

Whitechuck Glacier in the North Cascades National Park in 1973.

The same glacier in 2006.

The same glacier in 2006.

One fifth of the global carbon emissions are at present due to destruction of forests. This amount is greater than the CO2 emissions for the world’s transportation systems. An intact forest pumps water back into the atmosphere, increasing inland rainfall and benefiting agriculture.

By contrast, deforestation, for example in the Amazonian rainforest, accelerates the flow of water back into the ocean, thus reducing inland rainfall. There is a danger that the Amazonian rainforest may be destroyed to such an extent that the region will become much more dry. If this happens, the forest may become vulnerable to fires produced by lightning strikes.

This is one of the feedback loops against which the Stern Report warns: the drying and burning of the Amazonian rainforest may become irreversible, greatly accelerating climate change, if destruction of the forest proceeds beyond a certain point.

Erosion of topsoil

Besides depending on an adequate supply of water, food production also depends on the condition of the thin layer of topsoil that covers the world’s croplands. This topsoil is being degraded and eroded at an alarming rate.

According to the World Resources Institute and the United Nations Environment Programme, “It is estimated that since World War II, 1.2 billion hectares… has suffered at least moderate degradation as a result of human activity. This is a vast area, roughly the size of China and India combined.”

This area is 27 percent of the total area currently devoted to agriculture. The report goes on to say that the degradation is greatest in Africa. The risk of topsoil erosion is greatest when marginal land is brought into cultivation, since marginal land is usually on steep hillsides which are vulnerable to water erosion when wild vegetation is removed.

David Pimental and his associates at Cornell University pointed out in 1995 that “Because of erosion-associated loss of productivity and population growth, the per capita food supply has been reduced over the past 10 years and continues to fall.

The Food and Agricultural Organization reports that the per capita production of grains which make up 80 percent of the world’s food supply, has been declining since 1984…During the past 40 years nearly one-third of the world’s cropland (1.5 billion hectares) has been abandoned because of soil erosion and degradation. Most of the replacement has come from marginal land made available by removing forests. Agriculture accounts for 80 percent of the annual deforestation.”

Topsoil can also be degraded by the accumulation of salt when irrigation water evaporates. The worldwide area of irrigated land has increased from 8 million hectares in 1800 to more than 100 million hectares today.

This land is especially important to the world food supply because it is carefully tended and yields are large in proportion to the area. To protect this land from salination, it should be irrigated in such a way that evaporation is minimized.

Finally cropland with valuable topsoil is being be lost to urban growth and highway development, a problem that is made more severe by growing populations and by economic growth


Every year, more than 100,000 square kilometers of rain forest are cleared and burned, an area which corresponds to that of Switzerland and the Netherlands combined. Almost half of the world’s tropical forests have already been destroyed.

Ironically, the land thus cleared often becomes unsuitable for agriculture within a few years. Tropical soils may seem to be fertile when covered with luxuriant vegetation, but they are usually very poor in nutrients because of leeching by heavy rains. The nutrients which remain are contained in the vegetation itself; and when the forest cover is cut and burned, the nutrients are rapidly lost.

Often the remaining soil is rich in aluminum oxide and iron oxide. When such soils are exposed to oxygen and sun-baking, a rocklike substance called Laterite is formed.

 'We want our land back': Liberian communities speak out about big palm oil “We want our land back,” said Bindu Kannea, a mother and a farmer who lives in Grand Cape Mount County. In Liberia community resistance to palm oil expansion is about protecting their last remaining pieces of land. | Source:

“We want our land back,” said Bindu Kannea, a mother and a farmer who lives in Grand Cape Mount County. In Liberia community resistance to palm oil expansion is about protecting their last remaining pieces of land. | Source:

Secret land purchases in Africa

According to a report released by the Oakland Institute, in 2009 alone, hedge funds bought or leased nearly 60 million hectares of land in Africa, an area the size of France. – Source:


As populations increase, and as water becomes scarce, China, and other countries, such as Saudi Arabia are also buying enormous tracts of agricultural land, not only in Africa, but also in other countries.

These land purchases are very often kept secret from the local populations by corrupt governments.

Some conclusions

There is a danger that just as global population reaches the unprecedented level of 9 billion or more, the agricultural base for supporting it may suddenly collapse.

Ecological catastrophe, possibly compounded by war and other disorders, could produce famine and death on a scale unprecedented in history, a disaster of unimaginable proportions, involving billions rather than millions of people.

The resources of the earth and the techniques of modern science can support a global population of moderate size in comfort and security; but the optimum size is undoubtedly smaller than the world’s present population.

Given a sufficiently small global population, renewable sources of energy can be found to replace disappearing fossil fuels.

Technology may also be able to find renenwable substitutes for many disappearing mineral resources for a global population of moderate size.

What technology cannot do, however, is to give a global population of 9 billion people the standard of living which the industrialized countries enjoy today.


READ: The Need for a New Economic System – PART VI: Adverse Effects of Globalization

READ: The Need for a New Economic System – PART V: The Threats and Costs of War

READ: The Need for a New Economic System – PART IV: Neocolonialism and Resource Wars

READ: The Need for a New Economic System – Part III: Climate Change and the Urgent Need for Renewable Energy

READ: The Need for a New Economic System – PART II: Entropy and Economics

READ: The Need for a New Economic System – PART I : Limits to Growth

john_avery*John Scales Avery, Ph.D., who was part of a group that shared the 1995 Nobel Peace Prize for their work in organizing the Pugwash Conferences on Science and World Affairs, is a member of the TRANSCEND Network and Associate Professor Emeritus at the H.C. Ørsted Institute, University of Copenhagen, Denmark.

John Scales Avery is chairman of both the Danish National Pugwash Group and the Danish Peace Academy and received his training in theoretical physics and theoretical chemistry at M.I.T., the University of Chicago and the University of London.

He is the author of numerous books and articles both on scientific topics and on broader social questions. His most recent book is Civilization’s Crisis in the 21st Century

Other articles by John Scales Avery published by Human Wrongs Watch:

The Need for a New Economic System – PART VI: Adverse Effects of Globalization

The Need for a New Economic System – PART V: The Threats and Costs of War

The Need for a New Economic System – PART IV: Neocolonialism and Resource Wars

The Need for a New Economic System – Part III: Climate Change and the Urgent Need for Renewable Energy

The Need for a New Economic System – PART II: Entropy and Economics

The Need for a New Economic System – PART I : Limits to Growth

Israel, Iran and the Nuclear Non-Proliferation Treaty

Debt Slavery

Will the Real Issues Be Discussed in 2016?

Militarism’s Hostages

New Hope for Avoiding Catastrophic Climate Change

Exponential Growth

Albert Einstein, Scientist and Pacifist

“The Path to Zero: Dialogues on Nuclear Dangers”, by Richard Falk and David Krieger

Millay’s “Epitaph for the Race of Man” 

The Future of International Law (Part I)

The Future of International Law (Part II)

The Future of International Law (Part III)

Europe Must Not Be Forced Into a Nuclear War with Russia

Tactical Nuclear Weapons in Europe – The Dangers Are Very Great Today

Why Is the Total Elimination of Nuclear Weapons So Urgent?

Why Is the Military-Industrial Complex Sometimes Called “The Devil’s Dynamo”?

Of Reciprocity and Karma

Adam Smith’s Invisible Hand Is at Our Throats

Perpetual War

Kill or Be Killed… Or Both!

Does It Make Sense to Saw Off the Branch on Which You Are Sitting?

Blood for Oil – The Close Relationship Between Petroleum and War

**Image: Foresight 2015: Water stress and water scarcity (25 countries) by United Nations (UN post GEO2000) | Author: Lamiot | Wikimedia Commons

2015 Human Wrongs Watch

3 Responses to “The Need for a New Economic System – PART VII: The Global Food Crisis”

  1. Dear friends,

    i have not read the full text. Only the introduction in the news mail. But i will answer to this discussion with some principles:

    1) we have to dissolve all organized nonsens. The military, the para-military from the state and private, the military infrastructure for research, fabrication, administration. The same is valid with all forms of bureaucratism.

    2) we have to decentralize the economy on the principles: “global thinking, local doing” and “knowledge is always world heritage”. With that we come to the local independent economy, to local autonomy, to the local self determination and self organizing.

    3) we have to reforestrate all try regions on our planet. This we can do on the base of our global network for free technology. Free for all to participate, free for all to use it.

    4) we cooperate globally. We help all people on his way for local independence. And we use the help from the other people.

    Clear, on this way, we break all this egoism in our world, all this centralisation and monopolisation. Then everywhere on our world, the people organize her growing in any form, how they think, it is right. The basic for us is to help, that all people can organize his stable social and material base of life itself. And in all regions, the péople live from that, what they have and organize itself.

    many greetings, willi
    Salvador, Brasil


  2. Dear friends, please excuse my bad english. Not “try regions”. “dry regions”. Of course. Greetings, willi



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