I make a popular science video and all the emperors learn from it!

[Popular science on the earth, the ten most precious natural resources!]

[1st place: water resources.] 】

[Water is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. 】

[It is a colorless and odorless transparent liquid at room temperature and pressure, known as the source of human life, and is an important substance for maintaining life, also known as hydrogen oxide. 】

Water is one of the most common substances on Earth, with about 71% of the Earth's surface covered by water. 】

It is an important resource for the survival of all life, including inorganic compounding and human beings, and it is also the most important component of living organisms. It is found in small amounts in the air, but it is an important part of the air. 】

Water has played an important role in the evolution of life. 】

[Human beings have long begun to understand water, and in the ancient simple view of matter in the East and the West, water is regarded as a basic constituent element, one of the five elements;]

[There is also water in the ancient Western theory of the four elements.] 】

【...】

【Importance:】

Water is not only the main component of the body, but also has many physiological functions. 】

[The solubility of water is very strong, and many substances can be dissolved in water and dissociated into an ionic state, which plays an important role. 】

[Insoluble proteins and fats can be suspended in water to form colloids or emulsions, which are easy to digest, absorb and utilize; water directly participates in redox reactions in the human body, promoting various physiological speech movements and biochemical reactions, without water, it is impossible to maintain blood circulation, respiration, digestion, absorption, secretion, diarrhea and other physiological activities, and metabolism in the body cannot be carried out;]

【...】

[Adult body fluids are composed of water, electrolytes, low molecular weight organic compounds and proteins, etc., which are widely distributed inside and outside tissue cells, constituting the internal environment of the human body. 】

【...】

【Fresh Water Source:】

[1. Surface water. 】

Surface water refers to rivers, lakes or freshwater wetlands. 】

Surface water is formed by the accumulation of natural precipitation and snow over many years, and naturally drains into the ocean, disappears through evaporation, and seeps into the ground. 】

While the natural source of water in any surface water system comes only from precipitation in that catchment area, there are many other factors that influence the total amount of water in the system. 】

[These factors include the water storage capacity of lakes, wetlands, reservoirs, the permeability of the soil, and the characteristics of surface runoff in the catchment area.] 】

[Human activities have a significant impact on these characteristics, such as the construction of reservoirs to increase water storage, the release of wetlands to reduce water storage, and the increase in the amount and intensity of runoff through reclamation and the construction of ditches. 】

[The amount of water available at the moment must be considered. 】

[Some people's water needs are temporary, for example, many farms need a lot of water in the spring and not at all in the winter.] In order to provide water to these farms, the surface water system needs a large amount of water to collect water for an entire year and release it in a short period of time. The other part of the water demand is recurrent, such as the cooling water of power plants. In order to provide water to the power plant, the surface water system needs a certain capacity to store water, which can be replenished when the power plant is running low. 】

[Among them, Canada has the world's largest water supply.] 】

[2. Groundwater.] 】

[Groundwater is the water stored in the voids of the strata below the gas-bearing zone, including rock pores, fissures and karst caves. 】

[The water is in the ground, divided into many layers, which are called aquifers. 】

[3. Seawater desalination. 】

Desalination is the process of converting brackish water, usually seawater, into fresh water. 】

[The most common methods are distillation and reverse osmosis.] 】

[Today, desalination is more expensive than other methods and provides enough fresh water to meet the needs of a very small number of people.] This method only has economic value for water for high economic use in dry desert areas. 】

[It is most widely used in the Persian Gulf so far. 】

However, with the follow-up of technology, the cost of seawater desalination is getting lower and lower, and solar desalination technology is attracting more and more attention. 】

[There have been several plans to use icebergs as a source of fresh water, but so far they have only been used for novelty and have not yet been successfully implemented. 】

[Glacial runoff, on the other hand, is considered surface water.] 】

【......】

【Cherish water resources:】

[Although about 71% of the earth's surface is covered by water, the freshwater resources on land account for only about 2.53% of the total water bodies on the earth.] 】

[Nearly 70% of them are solid glaciers, i.e. alpine glaciers distributed in the polar regions and in the middle and low latitudes, which are difficult to utilize.] 】

[The freshwater resources that are relatively easy for human beings to use are mainly river water, freshwater lake water, and shallow groundwater, and the reserves account for about 0.3% of the world's total freshwater reserves, accounting for only 7% of the total water volume. 】

[According to research, from the perspective of the water cycle, the world's freshwater resources that are actually effectively used are about 9,000 cubic kilometers per year. 】

[The volume of water on Earth is about 136,000,000 cubic kilometers.] Oceans account for 132 million cubic kilometers (about 97.2 per cent), glaciers and ice sheets account for ** cubic kilometers (about 1.8 percent), groundwater accounts for ** cubic kilometers (about 0.9 percent), lakes, inland seas, and rivers account for 250 000 cubic kilometers (about 0.02 percent) of fresh water, and atmospheric water vapour accounts for 13 000 cubic kilometers (about 0.001 percent) at any known time. 】

[In other words, less than 0.1% of the water can actually be used.] (Read the violent novel, go to the Feilu Novel Network!)

[Water will soon become a profound social crisis, and the next crisis after the oil crisis is water.] 】

【...】

【Water Saving Measures:】

【...】

"It turns out that the most precious resource is the water we have to drink every day~!"

"Water comes first, and rightfully so. "

"That's right, I can go three days without food, but I can't go three days without water. "

"Master, I realize, the light curtain has said so much, it is for us to cherish the moment. "

"Huh, buddy, don't speculate. "

“......"

The ancients were quick to accept the result after a short period of surprise and water energy.

Qin Dynasty.

Ying Zheng sighed with emotion: "The authorities are confused, and the widows are always thinking about what is the most precious. "[]

"But I forgot that the most ordinary water on weekdays. "

"It's the most precious thing in the world. "

Other big (Wang Qianhao) ministers didn't expect this to be the result.

But they couldn't argue with it.

Even if there is something a hundred, if not a thousand, times more precious than gold in front of them now.

They can't admit it for themselves, it's more precious than water.

Three Kingdoms period.

Cao Cao had no sense of involvement in the whole process.

There is no other reason.

He didn't even have a unified country, how could he go overseas to seize precious resources?!

During the viewing, I could only keep sighing and grieving.

But now, he suddenly felt a sense of loss.

It's like a big dream.

What about other natural resources, no matter how precious?

After all, you have to live and enjoy yourself to be neighbors.

No matter how precious they are, they can't sustain life.

Cao Cao exhaled heavily, "That's it, wait for the lonely to dominate China, and then grab all the precious resources overseas!"