Chapter 64: Hypoxia

In the garage of the municipal police station, Qin Lan and other special policemen are organizing equipment. They have a field mission today to go to the railway station to receive a batch of equipment that has arrived in the city by rail.
"Li Tou, what equipment are we going to receive today?" When Qin Lan checked the gun in his hand, the teammates beside him curiously asked the leader of the team: "It is not always the market to receive supplies. Are you from the government? Why did you want our SWAT team to receive the equipment today?"
"You didn't listen carefully when the Ding team and the political commissar gave the briefing? Didn't you say it? It is a group of important materials that are vital to the evacuation shelter, so this time it is an armed and needs our special police team to receive it." The leader of Li's head is also a field equipment, while checking the ammunition while answering the questions of the people who proceeded.
　　I only heard Li Tou’s answer, but Qin Lan had some questions. She asked Li Tou: "Li Tou, shouldn’t things like and guarding go to the armed police? How did we let the special police go?"
　　 In Yan country, the armed forces controlled by the country are divided into three parts: the army, the police and the armed police.
Among them, the army is responsible for external operations and safeguarding national territorial sovereignty. The police is responsible for internally safeguarding public order and fighting crimes. The armed police are between the police and the army. They are not police, but are organized in accordance with the requirements and establishment of the army. The main responsibility is Local security and handling of emergencies.
　　According to the function, the of important materials should indeed be the matter of the armed police.
　　 Li Tou himself is a little confused about this issue, but now that the tasks have been assigned, they can't say that they will perform the tasks after they have figured it out.
　　 So Li Tou could only say to Qin Lan: "Maybe the city government is doing something wrong again. Now it is different from before. I am afraid that some things are not coming according to the rules."
Li Tou’s words made Qin Lan not know what to say. She just wanted to ask why this time it was not an armed police but was replaced by their special police, but what Li Tou said caused some people in the city government to think carefully. This is inevitable. Qin Lan felt helpless for a while.
　　 Although the country is still there, and government agencies are still operating normally, the end of the world is the end of the world. Although many things seem the same as before, they are actually different.
Li Tou may also feel that what he said is a bit inappropriate, so he patted Qin Lan on the shoulder and said to her: "Don't think about it so much, maybe it's just that the armed police can't get people from it? It's not like this before. Carry out the task first, and think about it later."
　　 Hearing Li Tou say this, Qin Lan also suppressed the mess of thoughts in her mind, and focused her attention on the task.
　　—
　　 The disaster brought about by the meteorite impact destroyed the original human civilization. Although there are not many survivors, these human beings have only survived.
　　 For these survivors, the most important thing is to survive. As for the reconstruction of human civilization, although the country is undergoing post-disaster reconstruction, the progress is very slow. It is still a very long thing to truly rebuild human civilization.
　　 This doomsday natural disaster has brought darkness and cold, although on the surface everything is going well now, it seems that it will not be long before people will be able to leave the refuge and start reconstruction after the disaster.
　　 But in fact, the real test brought about by meteorite impact has not yet come.
　　Anyone who has studied junior high school biology knows that everything depends on the sun for its growth. If there is no sunlight, most life on the earth cannot survive.
　　And now, the dust raised by the meteorite has covered the sky and lost the sunlight. Not only the temperature drop, but also the ecology that could be gradually restored is completely finished.
　　 The previous global fire has burned more than 90% of the vegetation on the earth, and a large amount of carbon dioxide has been emitted into the air. This has maintained the temperature drop in a short time, but without sunlight, the temperature will quickly cool down.
　　 Many people may have no idea about this, but just think about the four seasons on the earth just because the direct sun point changes can cause temperature fluctuations of tens of degrees, and you can understand what the loss of sunlight means to the earth.
　　 And there is a more critical problem here, that is, without light, photosynthesis cannot proceed. Without photosynthesis, carbon dioxide in the air cannot be converted into oxygen.
Oxygen is a very critical existence for life. The larger the size of life, the more dependent it is on oxygen. There are only some anaerobic bacteria that can survive on earth without oxygen. Other organisms, whether they are plants or animals, Oxygen is needed to sustain life.
　　 A big fire burned not only forest vegetation that can convert carbon dioxide into oxygen, but also consumed a considerable part of oxygen and emitted a large amount of carbon dioxide.
　　Although marine ecology still exists, marine plants such as seaweeds can still convert some carbon dioxide, but without sunlight, even seaweeds cannot carry out photosynthesis, and soon the ocean will fall into a crisis of lack of oxygen before the land. UU reading www. uukanshu.com
　　 Without oxygen, a large number of fish in the ocean will die, and marine ecology will collapse.
　　 As for the land, the previous global fires have wiped out a considerable part of the terrestrial organisms and burned most of the plants, and the terrestrial ecology had already collapsed at that time.
　　 After the double collapse of the marine and terrestrial ecosystems, the oxygen cycle in the atmosphere will no longer exist, and the oxygen content in the atmosphere will be further reduced.
　　 Under normal circumstances, the oxygen content in the atmosphere is 20.9%, and the oxygen content is lower than 18%, the human body will begin to experience hypoxia.
　　 This is like altitude sickness. At first, breathing may only increase slightly, and heartbeat and blood pressure will rise accordingly. It is easy to feel tired. People who are stronger may even feel nothing.
　　 But as the oxygen content decreases further, there will be obvious fatigue, concentration begins to decrease, thinking becomes confused, and even loses consciousness and falls into a coma.
　　 If the oxygen content continues to decrease, the human body will experience symptoms such as headache, tinnitus, vertigo, nausea, vomiting, and even death.
　　 There were originally a large number of plants on the earth for photosynthesis, and the oxygen content in the atmosphere was maintained at a relatively stable level.
　　 But now that the ecosystem has collapsed, it is no longer possible to rely on the ecosystem to self-regulate to restore the oxygen content in the atmosphere before the sun shines on the earth again.
Fortunately, before the disaster, mankind has three months of preparation time. Although the main energy of governments during that time was on how to prevent the meteorite from falling, it does not mean that the countries did not do well for the disaster. How to deal with the plan afterwards.