Chapter 71: Call the police if there is a problem

Although she was a little confused by Chen Xin's question, Mo Qingyan still answered his question: "Plants? Photosynthesis? There is a green plant box in my bedroom. Why do you suddenly ask about the ingredients? "
"The sky is covered by dust clouds and the sunlight is lost. What plants do photosynthesis? Without photosynthesis, where does the oxygen in the atmosphere come from?" Chen Xin's voice was flat, just telling a fact, but it made Mo Qing Yan felt a panic: "Although 70% of the oxygen in the atmosphere comes from the marine ecosystem, even the algae need sunlight to produce oxygen, and there is no sunlight now."
　　 "Do you mean that there is no oxygen in the atmosphere?" Mo Qingyan asked Chen Xin with a little panic.
Although Mo Qingyan couldn't see it, Chen Xin nodded: "If the conversion of carbon dioxide by photosynthesis in the ecosystem is lost, the concentration of carbon dioxide in the atmosphere will soon rise, while the oxygen content will continue to decrease. If you don’t need to wait for the oxygen to disappear, and the oxygen content in the atmosphere is below 10%, humans should be suffocated to death."
　　 "Ah! What should we do then?" Mo Qingyan hurriedly asked Chen Xin for help, her tone inevitably full of panic.
In the face of such planet-level disasters or environmental catastrophes, personal power is unlikely to make any changes. After all, this book is just a slightly sloppy science fiction novel. It is not a strange force, even the basic laws of physics. Fantasy novels that have not been told.
"Planting grass is a solution to the problem." Chen Xin said half jokingly and half earnestly, and then explained: "Since you have a green planting box, this problem is not difficult to solve. An adult normal breathing center The oxygen required requires about 10,000 leaves of average size for photosynthesis. If you calculate a tomato with 250 leaves, you need about 40 tomatoes, covering an area of ​​about 50 square meters."
Having said this, Chen Xin smiled. It was the first time he saw Mo Qingyan panicking. After laughing, he continued: "So as long as you make a large enough planting greenhouse in your basement, it will be enough. It guarantees the oxygen you need in daily life, and also provides you with enough vegetables and food."
"Ah! That's the case! So it's no wonder that when Aning and I went to your place last time, you didn't feel boring at all! It turned out that it was not because of good ventilation, but that there are plants in your place that produce oxygen!" Mo Qingyan heard Chen Xin said so, and finally reacted.
　　 At the same time, Mo Qingyan also realized that she felt that the air in the bedroom was good during this period not because of the good ventilation in the bedroom, but because of the green plant box in the bedroom where she had been turning on the fill light.
It’s just this situation that gave Mo Qingyan a new worry. She asked Chen Xin:
Axin, what about the shelter? There are tens of thousands of people living in the government shelter. If there is no oxygen, they will all die. ?"
　　 "You can think of this problem, do you think the country can't think of it? The government should have a plan to deal with it." Chen Xin is not worried about this, he does not think the country will ignore this problem like himself.
　　 If so many experts and scholars in the country cannot come up with a disaster response plan that can at least deal with most of the problems when the disaster is warned three months in advance, then this group of people is definitely a vegetarian meal.
　　 Hearing what Chen Xin said, Mo Qingyan also found that she was unreasonably worried. If there is no way for this catastrophic country that involves everyone, she can't do much alone.
However, Mo Qingyan still asked Chen Xin: "The government's refuge is all countries, so what about private refuges like ours? Axin, your planting greenhouse is not a big problem. What should I do? No, I really want to. Bring Aning and Qingxin to your place, right?"
"This matter is not difficult to solve. If I realized this problem in advance, a few fill lights and a few water tanks could solve the problem before the disaster, but now..." Chen Xin hesitated, but was still right. Mo Qingyan said: "You can try to build a large water tank to grow algae. The metabolism of algae is very fast. Under the condition of ensuring light, it can release oxygen quickly, which is more efficient than plants.
　　 It just consumes a lot of water and electricity to provide sunlight. However, the city government is still supplying water and electricity, so there is no problem in ensuring the survival of the three of you. "
　　 "Raising algae? How do you get this?" Mo Qingyan heard Chen Xin say this, and she let her worry go, and asked how to grow algae.
　　 "Use a grille board to raise it, keep the surface moist, and then continue to irradiate it with a fill light." Chen Xin was talking to Mo Qingyan while turning on the computer and searching for the information inside.
Chen Xin remembers that when he was writing a book, he found a document about the German Ecological Laboratory Building. It introduced that Germans used algae to make a biological facade of a building, cultivated biomass through photosynthesis, and used it for biogas reaction. Carbon dioxide is generated through biogas power generation to be used in biological facade recycling ~EbookFREE.me~ The main factor for the establishment of this cycle is that sunlight promotes the photosynthesis and mass reproduction of algae. In the absence of sunlight, we can only use supplementary lights. Come to make up.
　　 But in this way, the biomass produced by water algae for biogas power generation is definitely not enough to fill the light consumption, and additional energy consumption is required.
　　 Fortunately, Mo Qingyan did not cut off water or electricity. As long as the supply of water and electricity was guaranteed, she could still ensure the survival of her, Mo Qingxin and Ding Ning if she came up with such a set of equipment.
Chen Xin explained to Mo Qingyan the principle of the entire system and roughly how to make it, and Mo Qingyan also recorded what Chen Xin said, and planned to build a set of this in her refuge afterwards. Equipment for biological oxygen production.
"Thanks, Axin! If it weren't for your reminder, I'm afraid I would really have to be suffocated before I realize this problem." Mo Qingyan thanked Chen Xin, and thanked him without forgetting to say: "Aren't you thinking about my wine? I’ll give you another box of golden rum, even if I exchange these materials with you."
　　 Chen Xin couldn't help but feel a little surprised when Mo Qingyan said this: "Does it need to be so clear with me?"
"People say that my brothers still settle accounts. Even if we are brothers, it is better to be clear." Although Mo Qingyan said this with a smile, she was extra serious: "Although you don't mind if you say Axin I'm taking advantage of you, but in this end of the world, everyone should be clear so that there will be no conflicts."
Hearing Mo Qingyan said this, Chen Xin did not raise any objections. He just talked to her again about whether to tell the people in the survival group before saying to her: "By the way, Long Niang, help me tell Alan. With a sound, I said that I found a survivor in a supermarket in the direction of the high-speed rail station..."