The remaining airspace is not very large, and if the two helicopter squadrons can search as fast as possible, the source of the pollution can at least be found before midnight.

In this way, there is at least one to two hours left to eliminate the danger, and Wang Xiaosong is finally a little relieved. He sat in his chair, his eyes fixed on the large surveillance screen in front of him, listening to the phone calls on his side.

Time passed silently minute by minute, and Wang Xiaosong's heart was hanging higher and higher. Nearly an hour later, Wang Xiaosong received a phone call.

"Is it Comrade Wang Xiaosong, director of the Environmental Protection Bureau of Binlai New District?" said the other party.

Wang Xiaosong hurriedly said: "I am, who are you?"

"I am Su Bohui, the leader of the helicopter squadron at the Beiyuan base. We have just carried out the test according to your location, and now we have completed 80% of the free search, and we will also complete the search and detection of the remaining airspace within 10 minutes.

But based on our current results, it seems that we have found nothing. Director Lu asked that from now on, we will contact you directly and cooperate with your instructions. So the next step, how do we need it, please instruct you. ”

Wang Xiaosong only felt his heart sink suddenly, and now even the remaining airspace was about to be searched, but he still didn't find anything?

It's as if a person with an acute illness is dying, but the doctor can't find the cause.

Wang Xiaosong took a deep breath, closed his eyes and said, "Please find a suitable landing site and land on standby." ”

"Understood. Su Bohui said.

Wang Xiaosong closed his eyes, thinking about it in his mind, and suddenly, as if he had thought of something, he immediately called Wangui and asked Wangui to help him connect to the special line with the emergency headquarters.

"Director Lu, I would like to ask to speak directly with Professor Wu. Wang Xiaosong said.

Lu Yunsheng didn't say a word of nonsense, and directly handed the microphone to Wu Kaiwen, Wang Xiaosong immediately asked: "Professor Wu, I want to ask, do you have the meteorological data where the hole is located, the wind direction, what is the wind speed, can you please tell me?"

Wu Kaiwen nodded, although this kind of thing actually only needs an ordinary worker to do, but in order to save time, Wu Kaiwen simply read it to Wang Xiaosong in person.

After listening, Wang Xiaosong looked at the map and measured it little by little with a pencil, and suddenly, Wang Xiaosong said: "Wangui!

Wan Gui hurriedly brought the topographic map, Wang Xiaosong glanced at it, and suddenly said: "I understand! Professor Wu, the source of pollution is very likely to be in the Longshan Mountain Range." We'll go to the scene now. We will contact you all the way, so please be sure to wait for us. ”

After finishing speaking, Wang Xiaosong contacted Su Bohui: "Captain Su, please come to the Binlai New District Public Security Bureau to pick me up immediately! Wan Gui, did the technician tell you what to do after discovering the source of pollution?"

"Chlorinated hydrocarbons are combustibles that turn into water vapor and non-toxic salts when burned. So once the source of pollution is discovered, it is necessary to find a way to ignite it. Wan Gui said.

"Then what tools have you prepared now?" Wang Xiaosong asked.

At this time, Zhao Feiyang said directly: "What other tools do you prepare, there is an armed helicopter of the Air Force that will go with you, and when the time comes, it will be solved." ”

Wang Xiaosong nodded: "Okay, Feiyang, you continue to stay here and help me take command." I'll follow the Air Force helicopter in a moment. ”

At this time, Lu Fei suddenly rushed up: "Master, let me go with you." ”

Wang Xiaosong immediately said sharply: "No! This is not a joke, do you know how dangerous it is?"

"I went with you because I knew how dangerous it was. My dad doesn't believe me, and you don't believe me either?" Lu Fei looked at Wang Xiaosong and said.

This sentence can be regarded as talking about Wang Xiaosong's weakness, Wang Xiaosong sighed lightly: "Okay, I know, you prepare, and we will set off in a while." ”

Soon, Su Bohui landed on the square behind the county public security bureau with two helicopters, Wang Xiaosong and Lu Fei boarded the plane, and said to Zhao Feiyang below: "You stay here and wait for my news at any time, remember, stay here, I may need you to help me do things at any time." ”

Zhao Feiyang hurriedly nodded: "Don't worry, boss!"

When the plane took off, Wang Xiaosong greeted Su Bohui: "Captain Su, thank you for your support, our goal now is here." Inside the canyon at the back of the Yongsan Mountain Range. ”

"But it is now the core area of the nature reserve, and it is inaccessible, so how can there be a large amount of chemical chlorinated hydrocarbons in that place?" Su Bohui said in disbelief.

"My reasoning is simple. We have searched the entire new district using a sounding balloon and found nothing. You've 'checked and filled' other airspace now, but as things stand, it's not working.

It's no exaggeration to say that we've pretty much searched everywhere we can. Then the rest of the place is only the Longshan Mountain Range, which is known as the green lung of Binlai New District.

The air quality in the Yongsan Mountains has always been one of the highest in the province, so we never set our sights on there. And most importantly, the Yongsan Mountains are extremely mountainous due to their rugged terrain and two very narrow valleys.

So, the flight conditions in that place are very poor, which is why your helicopter squadron can't investigate directly.

Of course, there is also a decisive evidence that the meteorological data reported to me by the Meteorological Observatory today, if we extrapolate backwards from the location of the ozone layer hole, combined with today's wind direction and wind speed, the location we found is the Longshan Mountain Range!"

Hearing Wang Xiaosong say this, everyone immediately came to their senses, and Su Bohui directly commanded the helicopter formation and flew in the direction of the Longshan Mountain Range.

After about 20 minutes of flight, the flight formation arrived over the Longshan Mountain Range, and at this time, Wang Xiaosong still had deep worries in his heart, in case his guess was wrong. Isn't that too much delay?

Seeing that the helicopter formation had already flown over the Longshan Mountain Range, Wang Xiaosong looked at a few people next to him and said loudly: "Hurry up and test." ”

Everyone had already put on their gas masks, and the two operators immediately began to collect air samples and conduct on-site testing directly in the cabin.