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Zhang Wei can be said to have no understanding of the global food situation, so he can only make up for the relevant knowledge first, so that he knows how much food production needs to be increased each year to save China from a food crisis.

He commanded, and the intelligent assistant Xiaolan displayed the information he wanted to know on the virtual stereoscopic screen.

After careful study for a period of time, Zhang Wei finally had a preliminary understanding of the current situation of grain in China and other countries.

The world produces less than 2.5 billion tons of food each year, 1.4 billion Chinese consume 700 million tons (of which China produces 600 million tons and imports 100 million tons), 300 million Americans consume 300 million tons, 700 million people in Europe consume 400 million tons, and the other 4.5 billion people consume 1.1 billion tons.

From these data, it can be seen that there are many people in the world who are hungry, and a report released by the Food and Agriculture Organization of the United Nations and the World Food Programme also pointed out that the number of hungry people in the world has reached a record 1 billion, more than half of which are children, according to statistics, 18,000 children die of hunger and malnutrition every day, most of them in Africa, I have to say that this is an unimaginable tragedy, this is in the 21st century.

Of course, this actually has a lot to do with the Africans themselves, they can't raise too many children, but they like to give birth, in the past, due to backward medical technology, many children died, and now with the development of medical technology, the average life expectancy in Africa has been greatly extended, which makes Africa is facing a population ~ explosion, the world's highest fertility rate of 40 countries, of which 38 are in Africa! At the current rate, there will be 4.2 billion people in Africa by 2100, and almost half of the world's children under the age of 18 will come from Africa, up from a quarter today, according to a new study by UNICEF.

Africa is facing a population ~ explosion, and China is about to enter the space age, it needs a large number of scientists, and it has been decided to fully liberalize the family planning policy, and the population will inevitably continue to increase in the future, and the food consumed will naturally increase, so where does these over-consumed food come from?

You must know that the annual global grain trade volume is 200 million to 300 million tons, and even if all these grains are purchased, they can only meet 40% of China's current grain needs. And if China really buys that much grain, the price of food will definitely go up wildly, and China will have to pay a huge price. Moreover, if we rely entirely on imports, it is tantamount to putting the lifeblood of the country into the hands of other countries, which is a rather dangerous behavior, and as long as other countries take a little control of our food supply, we will immediately soften.

Therefore, we still have to be self-sufficient in food, and even if we have to import, we must have the confidence to face the worst: "Even if they don't sell it to us, we can still survive on the food we produce, at most with less meat." "In fact, the state has been doing this for so many years, and has been adhering to the red line of 1.8 billion mu of cultivated land.

After learning about the current situation of the food problem, Zhang Wei also felt a little shocked, and at the same time felt that this problem really needs to be solved urgently, the whole country is about to enter the space age, and a large number of scientists will be needed in the future, so scientists must not be hungry. And if you want to carry out interstellar colonization in the future, you will inevitably need a large number of people, and these people will also need to consume a lot of food, and without enough food, everything is empty talk.

So, how do you increase crop yields? How do you develop more arable land?

As for the first question, nature is to cultivate high-yield crops, in fact, the space plants that future technology companies are actively researching belong to this research, and genetically modified crops are actually a method, but it will take a long time to verify whether it will cause harm to the human body, and the resistance of the domestic people is also very high.

Regarding the second question, there are actually two ways, the first is to breed crops that can adapt to the harsh environment, such as rice that can be completely adapted to saline-alkali land. The total area of saline-alkali land in China is about 1.5 billion mu, if rice can be planted, according to the yield of 300 catties per mu, 450 billion catties of grain can be harvested every year, equivalent to about 37% of the national grain output in 2013. In fact, we have made some progress in this regard.

The second option is to convert land that is not suitable for growing crops into land suitable for growing crops.

Experts once had a relevant idea: "From the northwest coast of the Bohai Sea to an altitude of 1,200 meters above sea level, to the southeast of the Inner Mongolia Autonomous Region, and then along the surface of the trough in the east-west direction of the 42 degrees north latitude, it flows through the north of Yanshan and Yinshan, and goes west out of Wolf Mountain to enter the Juyan Sea, bypassing the remaining veins of the Horsehair Mountain into Xinjiang." The topography of Xinjiang is high in the east and low in the west, and after the seawater enters Xinjiang, it can form artesian flow, and then use the natural channel of the Shule River to flow into Lop Nur on the eastern edge of the Tarim Basin. ”

This is the "seawater westward diversion" project, which is conceived to suppress the desert by filling the dry salt lakes, saltwater lakes and closed tectonic basins in the desert with a large amount of seawater, forming ~ artificial seawater rivers and lakes. At the same time, a large amount of seawater relies on the abundant solar energy in the northwest to evaporate naturally, as a water and gas supply source for the humid ~ moist northern climate to increase rainfall, so as to achieve the purpose of controlling China's deserts and sandstorms, and completely changing the poor ecological environment in North China and Northwest China.

When this idea was first proposed, it aroused widespread controversy and questioning in public opinion across the country, and it is far from subsided, with some people even deriding the move as a joke similar to "tiling the Great Wall".

In fact, this idea did have many shortcomings at the time, not least the high cost of the project, the high cost of transporting seawater, and the risk of large-scale salinization of seawater into the interior.

However, with the small nuclear fusion atomic furnace technology provided by Zhang Wei, that is, the successful controlled nuclear fusion, these problems are not a problem.

As we all know, the raw material for nuclear fusion is helium-3, and every 1 kilogram of helium-3 burned can produce 19 megawatts of energy, 100 tons of nuclear fuel helium-3 can meet the energy needs of the earth for a whole year, and the Chang'e-7 spacecraft that the country is manufacturing has a payload of more than 500 tons, that is to say, Chang'e-7 only needs to go to the moon to transport helium-3, which can meet the earth's energy demand for 5 years.

With such a low cost of electricity, the cost of seawater desalination will also be greatly reduced, and the seawater can be directly desalined, and then the fresh water will be introduced into North China and Northwest China to control deserts and sandstorms, and completely change the harsh ecological environment in North China and Northwest China. The construction of the whole project can be carried out by intelligent robots, they do not need wages, only need cheap electricity energy, and can work 24 hours a day, and the ability to work is strong, which can greatly reduce the cost of the project. As for the cost of transporting water, according to calculations, it takes 6.4 kilowatt-hours of electricity to lift a ton of water to an altitude of 1,280 meters (a predetermined altitude), which was a bit high in the past, but now it is not worth mentioning.

Therefore, the project can now be fully implemented.

Not only that, but this project can be expanded. There are eight deserts in the north of China from east to west, which are: Horqin Desert, Hunshandak Desert, Mu Us Desert, Kubuqi Desert, Ulan Buhe Desert, Tengger Desert, Badain Jaran Desert, and Taklamakan Desert. In the past, we didn't have much to do with these deserts, but now we can completely break the traditional mindset and make full use of the vast water of the Bohai Sea to transform all these deserts into arable land or residential areas, which is equivalent to adding land to several provinces for the country, with so much land, the country's population will be one billion more people, and the food will be completely self-sufficient, which is completely beneficial to the future.

In addition, China can build a large number of desalination plants to provide cheap fresh water and completely solve the water shortage problem faced by major cities in China.

I have to say that with the small nuclear fusion atomic furnace technology provided by Zhang Wei, many ideas that seemed difficult to achieve in the near future, or that seemed delusional to many people, can now be implemented, this is the power of science and technology, and this is the change brought by Zhang Wei.

In this regard, Zhang Wei said that he was very calm, and these projects were just small cases compared with the planetary transformation he was going to implement in the future. (To be continued.) )