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 that I built before. Why do you suddenly ask about the ingredients?" "
"The sky is obscured by dust clouds and sunlight is lost. How do plants rely on photosynthesis? Without photosynthesis, where does the oxygen in the atmosphere come from?" Chen Xin's voice was very calm, just telling a fact, but it made Mo Qing Yan felt frightened: "Although 70% of the oxygen in the atmosphere comes from the marine ecosystem, even algae need sunlight to produce oxygen, and now there is no sunlight."
"You mean, there will be no oxygen in the atmosphere?" Mo Qingyan asked Chen Xin with a hint of panic.
Although Mo Qingyan couldn't see it, Chen Xin still nodded: "If the conversion of carbon dioxide by ecosystem photosynthesis is lost, the concentration of carbon dioxide in the atmosphere will soon increase, while the oxygen content will continue to decrease. In addition, No need to wait until the oxygen disappears. If the oxygen content in the atmosphere falls below 10%, humans will suffocate to death.”
"Ah! What should we do?" Mo Qingyan hurriedly asked Chen Xin for help, her tone full of panic.
In the face of such planet-level disasters or environmental catastrophes, personal power has no possibility of making any changes. After all, this book is just a slightly unorthodox science fiction novel, not some strange force or chaos, and even the basic laws of physics are No more fantasy novels.
"Growing grass is a way to solve the problem." Chen Xin said half jokingly and half seriously, and then explained: "Since you have a green plant box, this problem is not difficult to solve. An adult with normal breathing can The oxygen required is about 10,000 average-sized leaves for photosynthesis. If you calculate a tomato plant with 250 leaves, you will need about 40 tomatoes, covering an area of about 50 square meters. "
At this point, Chen Xin smiled. This was the first time he saw Mo Qingyan panic. After laughing, he continued: "So as long as you build a large enough greenhouse in the basement of your house, it will be enough." It ensures the oxygen you need in your daily life and provides you with enough vegetables and food.”
"Ah! So that's it! So no wonder Aning and I didn't feel stuffy at all when we went there last time! It turns out it's not that the ventilation is good, but that you have plants producing oxygen!" Mo Qingyan heard Chen Xin said this and finally reacted.
At the same time, Mo Qingyan, who had come to realize this, also realized that the air in her bedroom that she felt was good during this period was not because the bedroom was well ventilated, but because of the green plant box in the bedroom where she kept the fill light on.
But this situation gave Mo Qingyan new worries. She asked Chen Xin: "Axin, what about the shelters? There are tens of thousands of people living in government shelters. If there is lack of oxygen, wouldn't they all die? ?”
"You can think of this problem. Do you think the country can't think of it? The government should have a response plan." Chen Xin is not worried about this. He does not think that 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 despite being warned of the disaster three months in advance, then these people are definitely sitting in their graves.
Hearing what Chen Xin said, Mo Qingyan also realized that her worries were unfounded. If there was nothing that could be done about this kind of catastrophic country involving everyone, she could not do much by herself.
However, Mo Qingyan still asked Chen Xin: "The government's shelters are supported by the state, but what about private shelters like ours? Ah Xin, you have a greenhouse there. It's not a big problem. What should I do? No, I really want it." Take Aning and Qing Xin to your place?"
"This matter is not difficult to solve. If I had been aware of this problem in advance, a few fill lights and a few water tanks could have solved the problem before the disaster, but now..." Chen Xin hesitated, but still said to Mo Qing Yan said: "You can try to build a large water tank to grow algae. Algae have a very fast metabolism and can release oxygen quickly when light is provided, which is more efficient than plants.
However, this will consume a lot of water and electricity to provide lighting. However, the city government is still providing water and power, so it is still no problem to ensure the survival needs of the three of you. "
"Growing algae? How to do this specifically?" When Mo Qingyan heard what Chen Xin said, she put down her worries and asked how to grow algae.
"Use a grid plate to raise it, keep the surface moist, and then use a fill light to continuously illuminate it." Chen Xin said to Mo Qingyan, while turning on the computer and searching for the information inside.
Chen Xin remembered that when he was writing a book before, he found a piece of information about the German Ecological Laboratory Building. It introduced that the Germans used algae to make the biological facade of the building, cultivated biomass through photosynthesis, and used it for biogas reactions. The carbon dioxide generated through biogas power generation is supplied to the biological facade for recycling.
The main factor for the establishment of this cycle is that sunlight prompts algae to photosynthesize and reproduce in large numbers. Without sunlight, it can only be compensated by fill lights.
But in this way, using biomass produced by algae to generate electricity using biogas will definitely not be enough for the supplementary light, and additional energy consumption will be needed.
Fortunately, Mo Qingyan's place had no water or electricity supply. As long as the supply of water and electricity was guaranteed, if she came up with such a set of equipment, she could still ensure the survival needs of her, Mo Qingxin, and Ding Ning.
Chen Xin explained to Mo Qingyan in detail the principles of the entire system and how to make it. Mo Qingyan also recorded everything Chen Xin said, and planned to build a set like this in her shelter later. Equipment for biological oxygen production.
"Thank you, A Xin! If you hadn't reminded me, I would have almost choked myself to death before I realized this problem." Mo Qingyan thanked Chen Xin, and while thanking her, she also said: "Aren't you thinking about my wine? ? I will give you another box of golden rum later in exchange for these information."
Hearing what Mo Qingyan said, Chen Xin couldn't help but feel a little surprised: "Is it necessary to be so clear with me?"
"People say that brothers settle accounts clearly. Even if we are brothers, it's better to settle accounts clearly." Although Mo Qingyan said this with a smile, she was extremely serious: "Although you don't mind, Ah Xin, I took advantage of you, but in this end of the world, everyone should be more clear-minded so as not to cause conflicts. "
Hearing what Mo Qingyan said, Chen Xin didn't raise any objections. He just chatted with her again about whether he should tell the people in the survival group before saying to her: "By the way, Long Niang, help me tell A-Lan." Just say that I found a survivor in a supermarket in the direction of the high-speed rail station..." (End of Chapter)