Chapter 71

Although confused by Chen Xin's question, Mo Qingyan answered his question: "plants? photosynthesis? I have a green plant box in my bedroom. How can you suddenly ask about the ingredients? "

"The sky is covered by dust clouds and sunlight is lost. What do plants rely on for photosynthesis? Without photosynthesis, where does oxygen come from in the atmosphere? " Chen Xin's voice is very insipid, just telling a fact, but it makes Mo Qingyan feel a thrill: "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."

"Do you mean there will be no oxygen in the atmosphere?" Mo Qingyan asks Chen Xin with a few panics.

Although Mo Qingyan couldn't see it, Chen Xin nodded: "if we lose the conversion of carbon dioxide by photosynthesis in the ecosystem, the concentration of carbon dioxide in the atmosphere will soon increase, while the oxygen content will continue to decrease. In addition, when the oxygen disappears and the oxygen content in the atmosphere is less than 10%, human beings should be suffocated. "

"Ah! What shall we do then? " Mo Qingyan rushed to Chen Xin for help, and her tone was full of confusion.

In the face of such planetary disasters or environmental catastrophes, there is no possibility for personal power to make any changes. After all, this book is just a slightly unorthodox science fiction, and it is not a fantastic novel that does not even talk about the basic laws of physics.

"Growing grass is a solution to the problem." Chen Xin half joked, half seriously said one thing, and then explained: "since you have a green plant box, this problem is not difficult to solve. The oxygen required for a normal adult breathing needs about 10000 leaves of average size for photosynthesis. If you calculate a tomato with 250 leaves, you need about 40 tomatoes, covering an area of about 100 square meters It's about 50 square meters. "

At this point, Chen Xin laughed. It was the first time that he saw Mo Qingyan flustered. After laughing, he continued: "so as long as you build a large enough greenhouse in your basement, it will be enough to ensure the oxygen you need in your daily life, and also provide you with enough vegetables and food."

"Ah! i see! So no wonder last time I went to your place with Anning, I didn't feel bored at all! It's not good ventilation, but you have plants producing oxygen! " When Mo Qingyan heard Chen Xin say so, she finally responded.

At the same time, Mo Qingyan also realized that the air in her bedroom was good not because of the good ventilation, but because of the green plant box in her bedroom, where she had always turned on the fill light.

But this situation makes Mo Qingyan have new worries. She asks Chen Xin, "ah Xin, what about the shelter? Tens of thousands of people live in government shelters. If they lack oxygen, will they all die? "

"You can think of this problem. Don't you think the country can think of it? The government should have a plan to deal with it. " Chen Xin is not worried about this. He does not think that the state will ignore this issue as much as he does.

If there are so many experts and scholars in the country who can't come up with a disaster response plan that can at least deal with most of the problems under the condition of three months' early warning of the disaster, then these people are absolutely living on a diet.

Hearing Chen Xin say so, Mo Qingyan also finds that she is worried about nothing. If there is no way to deal with this kind of catastrophe involving all people, she can do nothing by herself.

However, Mo Qingyan still asked Chen Xin, "all the countries have taken refuge from the government. What about our private shelters? Xin, it's not a big problem that you have a greenhouse. What should I do? No, I really want to take Anning and Qingxin to your place, right

"It's not very difficult to solve this problem. If I realized this problem in advance, a few lights and water tanks could solve the problem before the disaster, but now..." Chen Xin hesitated for a moment, but still said to Mo Qingyan, "you can try to get a large water tank to raise algae. The metabolism of algae is very fast. Under the condition of ensuring the light, it can release oxygen quickly, which is more efficient than plants.

But it will consume a lot of water and electricity to provide light, but now the city government is still supplying water and electricity, so it's OK to ensure the survival needs of the three of you. "

"Algae? How to do this? " When Mo Qingyan heard Chen Xin say so, she put down her worry and asked how to raise algae.

"Use grill board to keep the surface moist, and then use fill light to shine continuously." Chen Xin and moqingyan said, while turning on the computer, looking up the information inside.

Chen Xin remembers that when he was writing a book before, he found a document about the German ecological experimental building, which introduced that the German people used algae to make the biological facade of the building, cultivated biomass through photosynthesis for biogas reaction, and then generated carbon dioxide through biogas power generation to supply the biological facade for recycling.

The main reason for the establishment of this cycle is that sunlight promotes the photosynthesis and mass reproduction of algae. Now, without sunlight, we can only make up for it by using fill light.

But in this way, biogas power generation with biomass produced by algae is certainly not enough, and additional energy consumption is needed.Fortunately, Mo Qingyan doesn't cut off the water and power supply. As long as the water and electricity supply is guaranteed, she can still guarantee the survival needs of Mo Qingxin and Ding Ning.

Chen Xin explained in detail to Mo Qingyan the principle of the whole system and how to make it. Mo Qingyan also recorded what Chen Xin said and planned to build a set of such equipment in her own refuge to produce biological oxygen.

"Thanks a Xin! If you didn't remind me, I'm afraid I would have suffocated to realize this problem. " Mo Qingyan said thanks to Chen Xin, not forgetting to say: "don't you miss my wine? I'll give you a box of Kim rum later, and I'll exchange the information with you. "

Hearing Mo Qingyan say so, Chen Xin can't help feeling a little surprised: "is it necessary to calculate so clearly with me?"

"It's said that if we're brothers, we'd better be clear." Although Mo Qingyan said so with a smile, she was very serious: "although you don't mind me taking advantage of you, ah Xin, now in the end of the world, we are still clear enough to avoid conflicts."

After hearing Mo Qingyan say so, Chen Xin didn't raise any objection. He just talked with her again about whether to tell the people in the survival group. Then he said to her, "by the way, long Niang, please help me talk to a LAN, that is, I found a survivor in a supermarket in the direction of the high-speed railway station..."

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