In the garage of the city police station, Qin Lan, along with other special police, was sorting out the equipment, and they had a field mission today, going to the railway station to receive a batch of equipment that had arrived in the city from the railway.

"Li Tou, what equipment are we going to receive today?" When Qin Lan was checking the gun in his hand, the teammates beside him asked curiously to the leader who led the team: "Aren't they all people from the city government who usually receive supplies?" Why did you ask our SWAT team to receive the equipment today? ”

"You didn't listen carefully when Team D and the political commissar gave a briefing just now? Didn't you say it, it was a batch of important materials that were vital to the life and death of the shelter, so this time it was an armed escort, and we needed our SWAT team to receive it. The leader, known as Li Tou, was also dressed in field equipment, checking ammunition and answering questions from his subordinates.

Just hearing Li Tou's answer, Qin Lan had some questions, she asked Li Tou: "Li Tou, shouldn't this kind of thing be escorted and guarded by the armed police?" How did you get us SWAT on? ”

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

Among them, the armed forces are responsible for external operations and safeguarding the territorial sovereignty of the country, and the police are responsible for maintaining public order and cracking down on crime internally, while the armed police are between the police and the armed forces, and do not belong to the police, but are organized in accordance with the requirements and establishment of the armed forces, and are mainly responsible for local security and handling emergencies.

In terms of function, the matter of escorting important materials should indeed be the business of the armed police.

Li Tou himself had some doubts about this question, but now that the tasks have been issued, it is impossible for them to say that they will carry out the tasks after figuring them out.

So Li Tou could only say to Qin Lan: "Maybe it's the city government doing something again, it's different now than before, I'm afraid some things are not 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 escorted by the armed police but replaced by their special police, but what Li Tou said was involved in the careful thinking of some people in the city government, which inevitably made Qin Lan feel helpless.

Although the state is still there, and the government agencies are still functioning normally, the last days are the last days, and although many things still look the same as before, they are actually different.

Li Tou may also feel that what he said was a little inappropriate, so he patted Qin Lan's shoulder and said to her: "Don't think so much, maybe it's just that the armed police can't draw manpower?" It's not like this before. Perform the mission first, and then think about it when you come back. ”

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

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The catastrophe caused by the meteorite impact destroyed the original human civilization, and although there are not many survivors now, these humans have only survived.

For these survivors, the most important thing is to survive, as for the reconstruction of human civilization, although the country is rebuilding after the disaster, but the progress is very slow, and it is still a very long time to truly rebuild human civilization.

This apocalyptic disaster has brought darkness and cold, although on the surface everything is okay now, and it seems that it will not be long before people will be able to leave the shelter and start rebuilding.

But in reality, the real test from the meteorite impact is yet to come.

Anyone who has studied biology in junior high school knows that everything depends on the sun, and without sunlight, the vast majority of life on Earth would not survive.

And now, the dust kicked up by the meteorite has obscured the sky and lost sunlight, not only the temperature has dropped, but also the ecology that could have been gradually restored has been completely finished.

The previous global fires have burned more than 90% of the vegetation on the planet, and a large amount of carbon dioxide has been emitted into the air, which has sustained the drop in temperature for a short time, but without sunlight, the temperature will still cool down quickly.

Many people may not have any idea about this, but just think about the four seasons on the earth that can cause the temperature to fluctuate by tens of degrees just because of the change in the direct point of the sun, and you can understand what the loss of sunlight means for the earth.

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

Oxygen is a very critical existence for life, the larger the life depends on oxygen, the only anaerobic bacteria can survive on the earth without oxygen, and other organisms, whether plants or animals, need oxygen to maintain life.

A fire not only burns forest vegetation that converts carbon dioxide into oxygen, but also consumes a considerable part of the oxygen and emits a large amount of carbon dioxide.

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

Without oxygen, fish in the ocean would die in large numbers and marine ecosystems would collapse.

As for the land, the previous global fires had already wiped out a significant part of the terrestrial life and burned most of the plants, and the terrestrial ecology had collapsed by then.

When both marine and terrestrial ecosystems collapse, the oxygen cycle in the atmosphere will cease to 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 less than 18%, and the human body will begin to experience hypoxia reaction.

It's like altitude sickness, which may start with just a little faster breathing, a rise in heart rate and blood pressure, and a tendency to feel tired, and people who are physically stronger may not even feel anything.

However, as the oxygen level decreases further, it will be followed by a noticeable feeling of fatigue, a decrease in concentration, confusion in thinking, and even loss of consciousness and coma.

If the oxygen level continues to decrease, the human body will experience symptoms such as headaches, tinnitus, dizziness, nausea, vomiting, and even death.

Originally, there were a large number of plants on the earth that carried out photosynthesis, and the oxygen content in the atmosphere was maintained at a relatively stable level.

But now that ecosystems have collapsed, it is no longer possible to restore oxygen levels in the atmosphere by self-regulating ecosystems before the sun shines on the earth again.

However, before the disaster, mankind had three months to prepare, and although the main focus of governments during that time was on how to prevent the meteorite from falling, it did not mean that countries did not have a plan for how to deal with the disaster when it struck.