The drizzle has been falling, with no sign of getting heavier or stopping.
Although the protective clothing had a very good thermal insulation effect, Chen Xin still felt a little chilly.
"Huh...huh..." Chen Xin's breathing was a little rough. Although the protective mask could effectively block harmful components in the air, it also affected breathing.
It was fine before, but now as Chen Xin's breathing quickened after walking for a while, he felt a little out of breath.
Chen Xin originally wanted to find a place to sit down, rest, and calm his breathing, but seeing the rain and mud everywhere on the ground, he decided to keep walking.
After all, he was just a little out of breath. Chen Xin had a similar experience when he traveled to Shu before. It would be better to walk a little slower.
However, this also made Chen Xin doubt whether he really lacked exercise as Qin Lan said. When he traveled to Shu, he was out of breath due to altitude sickness caused by the high altitude and thin air.
Could it be that because I have neglected to exercise in the past few years as a professional online writer, my physical condition has really deteriorated
Chen Xin had such doubts and couldn't help but wonder if he should get a human-powered generator and put it in the shelter. When he had nothing to do, he could step on the human-powered generator to generate energy and exercise.
But just when Chen Xin was thinking this, he suddenly stopped and raised his head to look at the sky.
The rain fell on the visor of the protective mask, leaving ugly stains, but Chen Xin still looked at the sky intently, looking at the thick dust clouds in the gloomy and dark sky.
"Damn it! It's lack of oxygen!" Chen Xin was not stupid, he just subconsciously ignored the problem.
Who cares about the oxygen we breathe all the time? I'm afraid it's only when you are really out of breath that you realize you need oxygen, right
When preparing to build a shelter before the disaster, Chen Xin subconsciously ignored this issue and just prepared oxygen bottles in the shelter.
But now when he realized that he had encountered a problem of hypoxia, he realized that when the plants on the surface were burned by fire and the sky lost sunlight, the air we were most accustomed to had become necessary for survival. The biggest problem faced.
Humans need oxygen to live, and any activity of the human body also requires oxygen to maintain, and the more intense the activity, the more oxygen is consumed.
In the absence of photosynthesis by natural plants, the oxygen in the atmosphere will gradually decrease as the surviving humans consume it.
This process will be irreversible unless the dust clouds in the sky clear and sunlight returns to the earth, allowing new plants to sprout for photosynthesis.
If the surviving humans want to survive, they can only find ways to generate new oxygen.
Chen Xin himself is not worried about this problem. There is a planting greenhouse in his shelter. Under the light simulated by the fill light, all crops will still perform photosynthesis, which is enough to maintain his oxygen consumption for now.
As for official shelters, Chen Xin feels that the country should take this issue into consideration. The only uncertainty is whether the country can perfectly solve this problem.
After all, what the country has to consider is all the survivors in the country, not the issue of a certain shelter.
Common oxygen preparation methods include physical oxygen production and chemical oxygen production. Physical oxygen production is simply to collect oxygen in the air and use it where oxygen is needed; while chemical oxygen production is through chemical reactions. Reduce the oxygen element in carbon dioxide or other oxygen-containing raw materials to form new oxygen.
Both of these methods were widely used methods of producing oxygen before the disaster, but in the current apocalypse, these two methods are not so applicable.
Physical oxygen production requires a lot of electricity and only extracts the original oxygen in the air. In the current environment where the oxygen content in the atmosphere is gradually decreasing, this method is not applicable.
As for chemical oxygen production, although it does not have the disadvantages of physical oxygen production, it also has disadvantages, that is, chemical oxygen production requires the consumption of chemical agents, and the cost is high, which is not suitable for large-scale application.
Therefore, if the Yanguo government wants to solve this problem, it can only use methods other than these two methods to solve it.
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"Finally the mission is completed!"
After completing the task of escorting the oxygen-generating equipment, the SWAT team returned to the shelter under the police station, and everyone relaxed.
Although most of the SWAT team members did not know what the supplies they were escorting were, they could guess that these were very important supplies after seeing the armored train at the train station and the formation of the escort.
So when escorting this batch of supplies, everyone was actually very nervous.
Now that the task was finally completed, everyone naturally breathed a sigh of relief.
The group of people walked towards the area where the SWAT team was, talking and laughing. Although this mission was not tiring, everyone was a little hungry due to the high level of mental stress.
Although the food in the shelter is not that good, after completing the mission, it is a happy fact to have something to fill your stomach.
However, because the food currently eaten in the shelters is mainly emergency food stored before the disaster, although there is a canteen, it is actually only used to distribute rationed food, and there is no fire for cooking.
After all, fuel is precious now, so using it for cooking is still a bit of a luxury.
As for the cultivation greenhouses that have begun to produce mushrooms, as well as artificially raised mice and mealworms, although these foods have gradually begun to appear on the diet of shelters, they are not yet at the point where SWAT team members can only eat these. .
"By the way, what do you have to eat today?" A SWAT team member hooked his shoulder with the friend next to him and asked him.
"I think it's mutton stir-fried with green onions. Yesterday's was shredded pork with Beijing sauce. It's time to change the taste today."
His companions responded to his words, making it sound like the food they were eating was okay, but in fact they were just talking about the taste of self-heating food.
In the two months since the disaster struck, except for mushrooms and mouse meat, no one has seen fresh food for a long time.
Another SWAT team member on the side interjected: "I think there should be cabbage soup today anyway. Yesterday we brought back a box of cabbage! A whole box of fresh cabbage!"
"No! Zhu Zhu and I carried it together. It weighed two hundred kilograms!" A SWAT team member next to him who also carried vegetables yesterday said that when he talked about those cabbages, his eyes lit up.
Not everyone knows about the news of fresh vegetables. Now that they learned about it, many SWAT team members cheered excitedly: "Oh oh oh! I haven't smelled cabbage in two months!" ( End of this chapter)