The girl's cute behavior made Ye Fan chuckle, and then his expression changed, "What are the conditions for the formation of smog?"

Ning Xi's thoughts ran fast and he said confidently: "Large-scale fog and haze weather mainly occurs in the situation of large-scale atmospheric circulation with weak cold air and good water vapor conditions, and the low altitude near the ground is calm or light."

"Due to the high humidity and large water vapor in haze weather, fog droplets provide an adsorption and reaction field, which accelerates the conversion of reactive gaseous pollutants to liquid particulate matter components. The two interact and quickly form pollution."

"How to improve the haze weather?"

"Forehead……"

Suddenly, the confidence on Ning Xi's cheeks quickly disappeared, and a bit of bitterness appeared, "Brother, these can't be found~"

Ye Fan smiled and asked: "There should be related improvement methods on the Internet, why can't you find it?"

Ning Xi pursed her red lips and explained in a low voice, "Those methods are useless at all. If they were useful, the smog weather in the imperial capital would have been improved a long time ago."

"clever!"

Ye Fan rubbed the top of Ning Xi's head, a smile on his face like a spring breeze, and he talked eloquently: "Now there are only a few known ways to improve the smog weather."

"What is guided by source dust suppression, combined with emission control technology to achieve comprehensive treatment, with bio-nanofilm dust suppression technology as the core, assisting other dust removal technologies, maximizing the suppression of industrial dust emissions, reducing industrial dust emissions, the whole The orientation improves the atmospheric environment.”

"Then is to strengthen the supervision of civilized construction on construction sites, as well as the supervision of heating, coal-fired power stations, and so on."

"Over the years, the Imperial City Air Management Bureau has used these methods over and over again, but the effect has been minimal, so..."

Speaking of this, his voice changed, his voice was low but with a certain meaning that could not be ignored, "If you want to improve the smog weather in the imperial capital, you must not follow the rules and study in the direction of traditional improvement measures, there is only a dead end. One!"

Ning Xi nodded lightly, agreeing with Ye Fan's point of view, "Brother, do you have any idea?"

Ye Fan narrowed his eyes slightly, and pointedly said: "Do you remember what you said just now?"

"I?"

Ning Xi's little finger pointed to her nose, her face confused, when she noticed the smile in Ye Fan's eyes, she got up and came to his back, a pair of jade arms around his neck, her soft voice was full of coquettishness, " Brother, don't sell off, tell Xiaoxi quickly~"

The scent of the nose and the amazing softness from behind made Ye Fan froze, "That...Xiao Xi, sit down first."

"Do not!"

The strength on Ning Xi's arm did not decrease, but increased, and buried her head on the back of Ye Fan's neck, exhaling Fang Lan said, "If my brother doesn't say it, I won't let it go!"

"I said……"

Ye Fan swallowed his saliva with difficulty, and there was a bit of restlessness in the depths of his eyes, and bitterness was also mixed in it.

He has always been confident in his own stamina.

Losing a loved one and experiencing death, these experiences made him see through life, which was the main reason why Ning Xi often complained about Ye Fan being too old.

But every time he was intimate with Ning Xi unintentionally or intentionally, his concentration seemed to not exist at all!

Is he too sexy?

Do not!

It's his girl, too tempting! ! !

"It's almost there."

Ning Xi laughed like a bell, and she let go of her hands and sat down again with satisfaction. She had no idea how much torment Ye Fan had caused by her actions just now.

Ye Fan quickly suppressed the distracting thoughts in his heart, looked up at the girl's charming smile, his throat moved, and there was something unusual in his words, "Xiao Xi, you just said that the large-scale haze weather mainly occurs when the cold air is weak. and large-scale atmospheric circulation with better water vapor conditions."

"That's right."

Ning Xi nodded nonchalantly and said, "These are all information that can be searched on the Internet. In the past two days, I have also watched a lot of simple animations about the formation of smog, and I have learned a lot of knowledge that I didn't know before."

Ye Fan affirmed, "Well, continue."

Ning Xi rested her small hands on the table, her words softly: "There are two main reasons for the formation of the smog weather in the imperial capital, one is that the air in the imperial capital is relatively humid, and the other is related to the high amount of dust in the air, I think it should be Start with both.”

After she finished speaking, she stuck out her tongue playfully, and said weakly, "If it's not right, don't make fun of Xiaoxi!"

As soon as the voice fell, the shoulder **** the right shoulder slipped, and a little astonishing whiteness appeared, instantly reflecting the whole room in a spring mood.

"Boom!"

The girl was instantly embarrassed. Because she got up too quickly, she directly brought the stool down. She hurriedly pulled the shoulder straps, her face was flushed, her head was lowered, and the blue silk draped over her back fell to her front along with the smooth skin, with a soft voice. Like a mosquito buzzing, "Brother, can you... go out first, I want... change your clothes."

Damn suspender skirt, I won't wear it even in the dormitory in the future!

so ashamed...

Ye Fan held back his smile and walked towards the door without saying a word. When the door was about to close, he suddenly turned his head to look inside, "Xiao Xi, you look good in a suspender skirt."

"Don't say it!"

The girl stomped her feet, quickly got up and closed the door, leaning her back on the door, her little heart beating rapidly.

Done!

The bad guy must have seen it...

ahhh-

Outside the door, Ye Fan grinned, looking up at the gray sky.

Compared to the morning, due to the appearance of Father Sun, the grayness gradually became dim. I believe that the sky will return to blue again soon.

Recalling Ning Xi's analysis just now, Ye Fan's eyes were filled with admiration.

As expected of his girl, he grasped the point so quickly, so that the following lessons will be much easier.

That's right, it's the course!

From the beginning, Ye Fan did not take the smog as a task, but regarded this S-level task as a class, and Ning Xi played the role of teacher and student in it, and he would teach Ning Xi more things as much as possible.

When he was stunned, the door behind him opened.

At this time, Ning Xi was wearing a plain long skirt, the skirt was close to the ankle. Compared with the suspender nightdress just now, it was a little less **** and more pure and beautiful.

Hearing the sound, Ye Fan's thoughts slowly returned, he turned around to look at the girl's dress, and commented: "Although this body is also very beautiful, I still like the suspender skirt just now, Xiaoxi, I don't need to dress so formally in the dormitory in the future. ."

Ning Xi: "..."

This color embryo!

Seeing that Ning Xi was silent, Ye Fan chuckled and continued to hover on the edge of death, "Xiao Xi, I really didn't lie to you, you look very beautiful in a suspender skirt, especially the shoulder straps..."

"I'm going to kill you!"