In the garage of the city police station, Qin Lan and other special police were sorting out their equipment. They had a field mission today to go to the railway station to receive a batch of equipment that arrived in the city from the railway.

"Tao Li, what equipment are we going to receive today?" While Qin Lan was checking the gun in her hand, her teammates beside her asked curiously to the leader who led the team: "Are you not the city government's people receiving supplies? Why did we ask our special police team to receive equipment today?"

"You didn't listen carefully when Team Ding and the Political Commissar were briefings just now? Didn't you say that it is a batch of important materials that are life-and-death for the shelter, so this time it is armed escort, and our special police team needs to receive it." The leader, known as Head Li, is also equipped with field equipment, answering his subordinates' questions while checking ammunition.

But when Qin Lan heard Li Tou’s answer, she had some questions. She asked Li Tou: “Li Tou, shouldn’t it be the armed police for escorts? Why did we get our special police?”

In Yan Country, the armed forces controlled by the state are divided into three parts: the army, the police and the armed police.

Among them, the army is responsible for fighting abroad and safeguarding national territorial sovereignty, and the police are responsible for maintaining social security internally and combating crimes. The armed police are between the police and the army and do not belong to the police, but are based on the requirements and organization of the army. They are mainly responsible for local security and handling emergencies.

According to functions, the matter of escorting important materials should indeed be the business of the armed police.

Li Tout himself was a little confused about this issue, but now that the tasks have been issued, they couldn't say that they would do it before they could execute the tasks after they figured it out.

So Li Tou could only say to Qin Lan: "Maybe the city government is doing something again. Now it is different from before. Some things are probably not based on the rules."

Li Tou said something that Qin Lan didn't know what to say. She just wanted to ask why it was not escorted by the armed police this time but replaced by their special police. However, what Li Tou said was related to the little thoughts of some people in the city government, which inevitably made Qin Lan feel helpless.

Although the country is still there and the government agencies are still operating normally, the end of the world is the end of the world. Although many things still look the same as before, they are actually different.

Li Tou may also feel that what he said was a bit inappropriate, so he patted Qin Lan on the shoulder and said to her: "Don't think so much, maybe it's just that the armed police can't pull out people? There has been such a thing before. Perform the mission first, and think about it when you have something to come back."

Hearing Li Tou say this, Qin Lan also suppressed the messy thoughts in her mind and focused her attention on the task.

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The disaster brought about by the meteorite impact destroyed the original human civilization. Although there are not many survivors now, these humans have only survived.

For these survivors, the most important thing is to survive. As for rebuilding human civilization, although the country is undergoing post-disaster reconstruction, the progress is very slow. It is still a very long time to truly rebuild human civilization.

This doomsday disaster brings darkness and coldness. Although on the surface, everything is still acceptable now, it seems that people will be able to leave the shelter and start post-disaster reconstruction.

But in fact, the real test brought by the meteorite impact has not yet arrived.

Anyone who has studied junior high school biology knows that all things grow by the sun. Without sunlight, most of the lives on the earth cannot survive.

Now, the dust from the meteorites has covered the sky and lost the sunlight. It not only caused the temperature to drop, but also made the ecology that could have gradually recovered completely.

Previous global fires have burned more than 90% of the earth's vegetation, and a large amount of carbon dioxide is discharged into the air, which has maintained the temperature drop in a short period of time, but without sunlight, the temperature will still cool down quickly.

Many people may have no idea about this, but they only need to think about the four seasons on Earth that can cause temperature fluctuations by dozens of degrees just because of the changes in the direct sunlight point, and they can understand what losing sunlight means to the earth.

And there is another more critical problem here, that is, without light, photosynthesis cannot be carried out, and without photosynthesis, the carbon dioxide in the air will not be converted into oxygen.

Oxygen is a very critical existence for life. The larger the body, the more severe the dependence of life on oxygen. The only thing that can survive on the earth is without oxygen. Other organisms, whether plants or animals, need oxygen to maintain life.

A fire burned not only the forest vegetation that could convert carbon dioxide into oxygen, but also consumed a considerable portion of the oxygen and discharged a large amount of carbon dioxide.

Although the marine ecology still exists, marine plants such as seaweed can still convert some carbon dioxide, without sunlight, even seaweed cannot perform photosynthesis, and soon the ocean will fall into a crisis of hypoxia on land.

Without oxygen, fish in the ocean will die in large quantities and the marine ecology will collapse.

As for land, the previous global fires had extinguished a considerable number of land creatures and burned most of the plants. The land ecology had collapsed at that time.

After the double collapse of the ocean and land ecosystems, the oxygen circulation in the atmosphere no longer exists, 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 less than 18%, and the human body will begin to experience hypoxia reactions.

This is like altitude sickness. At the beginning, it may just be that breathing is slightly faster, and the heartbeat and blood pressure rise accordingly, making people easily feel tired and stronger. People with stronger bodies may not even feel anything.

However, as the oxygen content further decreases, there will be obvious fatigue, attention begins to decline, thinking becomes confused, and even loses consciousness and falls into a coma.

If the oxygen content continues to decrease, the body will experience symptoms such as headache, tinnitus, blurred eyes, nausea, vomiting, and even death.

Originally, a large number of plants on the earth performed photosynthesis, and the oxygen content in the atmosphere was maintained at a relatively stable level.

But now the ecosystem has collapsed. Before the sun shines on the earth again, it is impossible to rely on the ecosystem to self-regulate to restore the oxygen content in the atmosphere.

Fortunately, before the disaster, humans had three months of preparation time. Although governments of various countries focused on how to prevent the fall of meteorites, it did not mean that countries did not make plans for how to deal with the disaster after it came.
Chapter completed!