Sun Chang opened his mouth and wanted to say something, but found that he couldn't say it, because he had also seen the glass, it was indeed the same as crystal, a very magical thing, since the glass was sealed, it was definitely not the water from the outside world running in, and the other party also deliberately put it two days in advance to prove it.

Then you put in the plants for another day and you see water droplets, which is indeed proof of this.

As for how the rain in the sky is formed, the ancients already understood this, so it is not difficult for Sun Chang to understand, just like the existence of water vapor, continuous condensation becomes water.

If this is the case, then the set of things that Dahan said is indeed effective, no wonder the other party is used to planting trees everywhere in the entire Dahan area. It's as if planting trees is a hobby.

"It seems that Leader Huo Gang is really a wise person." Sun Chang couldn't say anything more, so he could only add that if he didn't know much about this aspect, he wouldn't be much cheaper.

"That's natural, since my husband is traveling at such an age, he must be a person who likes to travel, and my husband must have traveled a lot of places." Zhou Zheng said with a smile.

"It's true that the old man has spent most of his life on the road." Sun Chang nodded.

"If the old man has observed carefully, he will know that there are some places in Datang, where there were originally forests all around, and later there were people there who cut down more and more trees into fields in order to open up wasteland, and as there are more and more fields, you will find that the place will become more and more arid, and even the wells in many places will dry up." Zhou Zheng smiled and gave another example.

"The chief has found a similar situation in many places in the Tang Dynasty, and according to the county records or other documents in those places, when there were many trees there in the past, it rained all year round, but since the trees are gone, the rainfall has become less and less, and the land has become more and more arid, and the leader even said that the continuous diversion of the middle and lower reaches of the Yellow River is due to soil erosion."

"It is because the Yellow River basin, such as Henan Province, and other places, has been turned into fields since ancient times, so the river channels around the Yellow River cannot be stabilized and the diversion occurs."

Zhou Zheng's words made Sun Chang stunned slightly, and then Sun Chang shook his head: "This situation is too huge, and the old man has not studied it, so he doesn't dare to comment too much." ”

"My husband is really a learned person." Zhou Zheng immediately exclaimed.

"Director Zhou has won the award." Sun Chang smiled.

"No, no, no, what I said is not at all, the leader said, ten years of cultivation, a hundred years of education, education is the most important thing, and as a responsible for education, one of our most important principles is that we do not understand the place, can not be taught to students casually, because this may mislead a student's life. Therefore, you can not comment too much when you don't understand, instead of directly denying or admitting it, which is not something that great wisdom can't do. Zhou Zheng said with the same serious expression.

Sun Chang was stunned for a moment, "This is also what your leader said?" ”

"Yes." Zhou Zheng smiled.

"This, I heard that Leader Huo is not very old, but his thinking is very mature." Sun Chang paused and said very tactfully.

"Haha, uncle, I didn't just talk nonsense for the leader's face, and the leader didn't need me to do this, because the leader really knows a lot of things, so please come with me, I can tell my uncle." Zhou Zheng said with a smile.

"Listen up." Sun Chang also smiled and nodded.

"Well, that's right, we are actually subordinate to the Ministry of Health of Dahan, and the Ministry of Health, as the name suggests, is to establish the entire health system of Dahan, including the medical system." Zhou Zheng said seriously.

"It's really the right thing to do." Sun Chang nodded.

"In fact, many diseases in our daily life can be prevented, and the chief believes that it is a microorganism that causes our body to get sick." Zhou Zheng opened his mouth to explain.

"Microbes? What is the solution? Sun Chang raised his head and glanced at Zhou Zheng.

"Microorganisms refer to tiny organisms, that is, things that we humans can't see with our eyes, and biology means living objects, such as humans, animals, and plants, which are all living things, and there are some organisms that we can't see with the naked eye, but they are widely present in nature, these are called microorganisms, and they are subdivided into bacteria, fungi, etc., but these still need us to prove." Zhou Zheng said seriously.

"Microorganisms, you can't see with your eyes, have you been sure?" Sun Chang asked.

"We can't be sure of this for the time being, but I believe it won't take long for us to be sure, for example, a tree that looks very large is indeed made up of very tiny parts, we call it a cell, and since cells can make up a big tree, they can also make up other organisms, and a big tree may be made up of countless thousands of cells, and the same is true for other organisms."

"Since the larger the size of these organisms, the greater the number of cells, then there may be organisms that only have two or three cells, or even one cell, and these are microorganisms."

"And these microorganisms are widely distributed in our world, most of the time we can't see them, and when we come into contact with these things every day, our hands and bodies will be contaminated with these microorganisms, and when these microorganisms enter our bodies, they will cause our bodies to get sick, just like if we swallow some stones, iron tools, etc., which will cause us problems."

"It's just that we also have internal organs in our body that can destroy these microorganisms, and when the number is small, we don't feel it, and once the number is large, it will cause wind chills, plagues, malaria and countless other diseases."

"And diseases like the plague are contagious, and they are actually transmitted through these invisible microorganisms."

"And if we do a good job of health protection in advance, such plagues and other diseases are completely preventable." Zhou Zheng said while taking Sun Chang in a direction.

"Have you argued these things?" Sun Chang asked again.

"We don't have a way to prove it directly, but we prove it from the side." Zhou Zheng shook his head.

"Oh? How so? Sun Chang was immediately interested.

"Uncle Sun, you came from Yumen Pass, what is your first impression of Yumen Pass?" Zhou Zheng looked at Sun Chang and asked another question with a smile.

Sun Chang paused, he thought about the situation after he had just entered the Yumen Pass, and after a long time he spoke: "Neat, clean, beautiful?" ”

"Yes, it is clean, the entire Yumen Pass has established a complete underground water system, all the people have a unique sewage channel in their homes, and the sewage used daily can be poured directly into the sewage channel, and the sewage will eventually gather outside the city through the underground pipeline sewage treatment firm."

"And all the garbage and feces in the city are handled by special personnel, and public toilets are set up in various locations in the city, and everyone is strictly prohibited from defecating anywhere, and we are constantly promoting the establishment of hand washing before and after meals, and the feces in the daily home chickens and ducks and other locations must be cleaned up frequently, and the places where the feces are piled up must be disinfected with quicklime frequently."

"Under such a policy, although the establishment of Yumen Pass in Dahan is very short, but in more than a year, the old man can go to various clinics in Yumen Pass and where the doctor is located to inquire, few people in Yumen Pass are sick, and many of the medicinal materials placed in the clinic are almost moldy, but they have not been used up." Zhou Zheng said with a smile.

"Really?" Sun Chang was stunned for a moment and asked.

"Of course. I don't dare to coax my husband to say this, after all, my husband can find out about things if he asks casually. Zhou Zheng said with a smile.

While speaking, the two of them have walked to the sewage treatment place, here is a large cement pond, in fact, this is like a biogas tank in later generations, but the biogas is not used in the homes of the people in Yumen Pass, but is used in the places around Yumen Pass where flames need to be used.

You can see these steel pipes stretching out into the distance over the pools.

Zhou Zheng introduced the situation here to Sun Chang, such as the manure system, where all the manure is made into fertilizer, and then pressed into the soil in the autumn, which can increase the yield next year.

In addition, the sewage is preliminarily screened, and the debris mixed in the sewage is also directly composted, and the sewage is directly mixed with the spring water and discharged in the swamp behind, there is no problem with the casual discharge of these sewage, because these sewage in this era are normal domestic sewage, and the domestic sewage of later generations is different, there are no chemicals in it.

The sewage discharged in the swamp lake can add fertilizer to the swamp, and it is easy to degrade naturally, so it can be said that there is no pollution.

Even the huge swamp north of Yumen Pass can no longer be regarded as a swamp, it should be said to be a huge lake. Now the Ministry of Construction is considering building a concrete embankment near the lake in the direction of Yumen Pass.

After listening to Zhou Zheng's explanation, although Sun Chang didn't understand this, he could hear that there was a complete set of perfect systems, especially some of the medical principles in what Zhou Zheng said, many of which Sun Chang had never thought about, but felt very reasonable.

"Director Zhou, I have a request." Sun Chang had been visiting the entire sewage pipe before he raised his head and spoke.

"Uncle Sun, please speak." Zhou Zheng said seriously.

"I wonder if Director Zhou can introduce me to Leader Huo Gang? The old man listened to Director Zhou's talk about microorganisms and the related medical system, and he suddenly felt enlightened about the knowledge of medicine, and he wanted to communicate with the leader. Sun Chang said.