For the hardest-hit areas, there are two main ways to eliminate the haze. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

One way is to think in the long run, strictly control the production of pollutants, strengthen the management of major factories, and limit the emission of exhaust gases from oil-consuming machines, including cars and ships, but in the end, the generation of smog is a hurdle that cannot be skipped in the process of the industrial revolution, and Europe and the United States have also experienced it, and they have successfully survived this hurdle and become the most developed region on the planet.

Another method is short-term treatment, that is, temporary elimination of haze, there are two main ways: one is to wait for the strong wind to blow away the haze, which can allow the haze to disperse over a wider area; The second is to wait for natural rain or artificial rainfall to settle the fine particles in the air.

Now, Hou Yi's choice is obviously the second type.

Hou Yi's 'Star Swallowing Arrow' completed the cleaning of an area with a diameter of one kilometer in just a few minutes, such a scene made Fang Mo and the others stunned.

"Hey, hey, hey! Wait a minute, will this have an impact on people in the city? Fang Mo came from behind and asked Hou Yi, "Have you ever used this kind of arrow before?" ”

"Used." Hou Yi said, and once again took out a 'Star Devouring Arrow' from the palm of his left hand: "I used to go into the mountains to hunt strange beasts, and encountered a poisonous fog, and it was this method that cleared all the poisonous fog in the mountains and forests. ”

"Let me take the liberty of asking, isn't your arrow used to destroy the sun in the sky? The consequences of that kind of power falling on the earth are unimaginable, right? ”

Hou Yi smiled when he heard this: "In the past, I could freely control the speed and power of arrows. ”

"And now?"

"I don't know what the reason is now, my strength can't be exerted at all, the arrow just now is already about eighty percent of my strength, as long as the height is enough, it will not cause damage to the city below, so I don't need to control my strength at all." Hou Yi looked at Fang Mo and said, "This is my bow and arrow, I know it better than anyone else. ”

"Okay, I'll put the security issue aside for a moment, your arrow just now shot too far, so I can't see the specific situation." Fang Mo then asked, "Can you tell me what the effect of that arrow just now was?" ”

"That arrow probably swallowed up the fog within a mile radius." It was Lin Dong who helped Hou Yi answer this question, and the distance was only ten kilometers, and he could even see a small leaf blown up by the wind.

"Okay, let's count it as a radius of one mile, converted to our modern unit is a radius of five hundred meters, and then I can roughly calculate..."Fang Ji began to gesture on his fingers: "The commercial market is only a very small city, but the area covered by the haze has also reached sixty square kilometers, if you want to clean up all the haze in such a large area, then calculate the distance between each arrow as one kilometer, so you may have to launch about eighty arrows." ”

"Eighty? Same as I estimated. Hou Yi nodded.

"Have you already calculated?" Fang Yi was helpless, and he also knew that he was purely worried, and now it seems that Hou Yi is really becoming more and more like a modern professionally trained sniper.

"Then I wish you a successful smog removal, report to the local area when the time comes, and send you a small certificate." Fang Ji said half-teasingly.

"Now there's another problem." Hou Yi said suddenly.

"It's because you don't have enough strength, right? In other words, your strength is limited and you are unable to complete the condensation of eighty archery techniques like the one just now. Lin Dong spoke again.

"Yes, I've found a way, but to complete the fog clearing of the city, I need to fire at least eighty arrows, and in fact, with my current situation, twenty more times is already the limit." Hou Yi said that in the past, he almost overdrew all his strength in order to shoot down nine suns, but now he is limited and shooting twenty arrows in a row is the limit.

Lin Dong walked slowly from the rear and said, "Give you a suggestion, let him think of a more thoughtful way for you, after all, he is the person of this world." ”

Lin Dong's words pointed directly at Fang G.

"Hey, wait, it was Hou Yi who said just now that he wanted to eliminate the haze, not me?" Fang Mo saw that Lin Dong and they wanted to push the matter on themselves again, so he immediately began to refuse.

"If you don't come up with a perfect solution for him, he won't be able to explain to those beggars." Li Yuanfang also said at this time.

"Well... It seems that it is up to the genius commander to solve the problem. Fang Mo knew that he couldn't hide from this matter, and he was really worried that Hou Yi would be consumed by this haze in the next few days, and he didn't have much time to wait here.

However, unlike before, just now Fang Ji thought that Hou Yi had no way to clear the haze because he didn't know that Hou Yi actually had this kind of arrow carrying a singularity, and if it was based on this kind of arrow, it might not be impossible to solve the current dilemma.

Fang Mo took out his mobile phone, first opened the map, and then searched for some information about the local weather conditions, which was extremely important for the next solution.

"The thickness of the haze is 100 meters... In terms of terrain, the terrain is higher in the north and flatter in the south. Fang Mo quickly paid attention, he drew a simple pattern on the ground, which was the outer outline of the commercial market, and Hou Yi and a few people also surrounded him when he saw this.

"As you can see, this is the basic map structure of the market, and our current location is here..."

"Today's winds were only two levels, but luckily the wind was pointing just to the flat terrain to the south."

"Hou Yi, if you have twenty arrows, I suggest you use them in two batches, and if the destructive power is not great, you can consider lowering it a little when the arrows fly over, try two hundred meters, maybe you can create a stronger wind on the ground, if there is about seven levels, it will be a strong wind."

"The first batch of arrows is based on the southern edge of the city as coordinates, each arrow is a kilometer apart, lined up in a line, surrounding the entire south of the commercial market, if the local haze is absorbed in a few minutes, then it will form a thin air belt with a length of more than ten kilometers and a width of one kilometer..."

"Because of the atmospheric pressure, the air from the north will soon rush to the south, and the strong wind left behind after the arrows disappear may eventually lead the haze in the north to move all to the south, but one time is definitely not enough, after waiting for half an hour, you launch a second wave of arrows to create a second large-scale flow of air... If it succeeds, perhaps in an hour or so, the smog of the market will be evacuated in the form of wind to the lower and flatter mountains and forests to the south. ”

"Of course, all of the above is just speculation, whether you can really do it or not depends on you."

Fang Ji, who gave the plan, looked at Hou Yi, and the latter nodded after hearing the plan.

If that's the case, it's worth a try.

(To be continued, please collect)