The explanation for Duanhan starts with the smell of feet on the shore.

At first, the two of them went on vacation to the coast, and when they rested, they smelled some foot odor. Xu Liang used this thing to make fun of Duan Han all over the audience, saying things like "you really have to wash your feet well", "you still want to find a female ticket like this". Duanhan himself also has a psychological shadow on his stinky feet.

You must know that anyone with foot odor, especially those who have personal experience (such as the author's fungus), as long as they are visiting other people's homes, or a relatively small indoor environment, the first concern is the question of "whether the room has a window". And if you don't open the window, then you must turn on the air conditioner, if you don't have the air conditioner, I'm sorry, I will never take off my shoes! You can provide me with shoe covers!

In short, the hearts of students with foot odor are extremely sensitive to the "smell".

Duanhan too.

So when they were at the beach, neither of them realized that the smell was the fundamental problem.

In fact, the seaside should have a fishy smell, such as the common seaweed snacks, if you unfortunately choke on the seawater, then you should know that the seawater is bitter and astringent, and the salty taste is secondary. But no matter what, it won't be the turn of the smell to come out.

In the afternoon, after two people surfing in the tsunami, the air was filled with a monstrous stench, as if 10,000 rotten eggs had been placed. Even after Xu Liang drove away from the coastline for a few kilometers, the smell gradually faded.

Obviously, this is by no means the smell of Duanhan's feet.

Therefore, from the outset, the focus of the investigation was on the composition of the gas and the possibility of successful testing of the composition of seawater. And not what tidal forces are announced in the news, changes in the distance between the Earth and the Moon, and so on.

Now, of course, the results are in.

Duan Han took this information and gave Xu Liang a brief explanation:

"Among the air components, the hydrogen fluoride content exceeds the standard, the hydrogen sulfide content exceeds the standard, the hydrogen chloride, that is, hydrochloric acid, the content exceeds the standard, and other types of chloride sulfide fluoride all exceed the standard!"

Xu Liang was a little confused when he heard it: "What are these?" ”

Duan Han: "In short, the stench you smell is the smell of these mixed halides, mainly sulfides. Remember what you learned when you were in school? What is the chemical gas that makes you guess that it smells of rotten eggs? It's hydrogen sulfide. ”

Xu Liang: "In other words, the tsunami just now produced a lot of things that can only be produced on your feet, right?" ”

"That's right, that's right." Duan Han replied with a dark face, "Not only that, but the test results of the composition of the seawater are also very different from the normal state. NORMALLY, THE WATER IS WEAKLY ALKALINE WITH A PH OF ABOUT 8.1, BUT THE SAMPLE WE USED SHOWS THAT THE SEA HAS BECOME MODERATELY ACIDIC, WITH A PH OF LESS THAN 3. Substances that cause acidity include, but are not limited to, excess carbon dioxide dissolution, complex compounds such as sulfides and chlorides. ”

Xu Liang was in a fog when he heard it, and he was really a little dizzy after talking about this chemical knowledge.

He said, "Why don't you just say the conclusion?" ”

Duan Han shook his head: "I can't say the conclusion directly." It is necessary to express the derivation process more perfectly. ”

"Do you remember, when we first started, we had a brief analysis of the causes of the tsunami? It's just that: undersea earthquakes, volcanoes, nuclear explosions, and, most unlikely, changes in the orbit of the moon. Then now it's time to do the elimination method. First of all, submarine earthquakes and volcanic eruptions can be ruled out, because both of them are directly observable and we do not observe them at all. A change in the moon's orbit can also be ruled out for the time being, so there is only one possibility left. It's a nuclear explosion. ”

"The question, however, is who would have detonated so many nuclear explosions in the world's coastal areas? Is there any country that has the strength? ”

"The question of strength is actually shared by several of the strongest powers in the world. However, do not forget that the tsunami that occurred this afternoon was an indiscriminate attack, and all of these large countries in the world suffered huge tsunami attacks, and the stronger the country, such as the United States, suffered more heavy losses. Moreover, in a political system that emphasizes profit and exchange in modern society, this kind of indiscriminate attack on human society will not bring any benefit to any country or political system! ”

"The only people who might be happy, or those who want to make war money, or people like you and me."

Xu Liang listened carefully, although Duan Han's analysis contained a lot of technical terms, relatively speaking, it was already quite easy to understand.

He thought for a moment, and suddenly asked a crucial question: "If you say so, wouldn't these four possible causes be ruled out?" ”

Duan Han shook his head.

"It seems to have been ruled out. In fact, there is still a possibility, and this possibility is in these two documents in my hands. ”

"First of all, we assume that these tsunamis were not caused by humans, which is a basic assumption; And then let's assume that there is an explosion that produces a relative TNT yield that is no less than a nuclear bomb explosion, or even exceeds! ”

Xu Liang seriously considered the two possibilities that Duan Han said in his mind: those that were not caused by humans and were more powerful than nuclear bombs.

His brow furrowed, as if he had found some ideas in his head, but he couldn't grasp him completely.

Duan Han said again: "Old Xu, have you ever thought about such a question. ”

Xu Liang: "What? ”

Duan Han: "What would happen if the fossil fuel reserves under the ground suddenly caught fire and exploded, have you thought about this question?" ”

Xu Liang's heart sank: "Fossil fuels? You mean oil? Oil mines? ”

Duan Han nodded.

"That's right, that's what it means." She explained, "Have you ever heard of the Gates of Hell? An open-pit fossil fuel mine in Turkmenistan has been burning quietly in the air for hundreds of years! Have you ever thought that although these fossil fuels can be used by humans little by little by extraction, there is another more extreme way......"

"That's a one-time detonation!"

Xu Liang thought about this scene, and suddenly felt a little terrifying.

Duan Han's words reminded him of the golden bay of oil - the Persian Gulf.

The Persian Gulf is an inland bay of the Arabian Peninsula, covering less than 0.1% of the Earth's total area, but more than 65% of the world's proven oil reserves. As a result, the countries of the Persian Gulf region have become the richest countries in the world because of these fossil fuels. Its per capita GDP even exceeds that of old industrial powers such as Europe and the United States.

The thing Duan Han said is actually very realistic:

What if the oil was not mined peacefully, but exploded in an instant?

It is not that such things have not happened in history.

As early as the early nineties of the last century, Irakr invaded the Special Committee of Science and Technology because of the problem of oil resources, and occupied the entire territory of the Special Committee of Science and Technology in just a few days, and later was forced to withdraw under the leadership of the United Nations multinational force led by the United States.

During the evacuation, the Irakr army did something earth-shattering!

Until today, 30 years later, the people of the Science and Technology Commission still remember this incident vividly. That's right, this thing is that the Ilahkr army set fire to all the oil rigs of the Science and Technology Commission!

There is a detail to mention, the oil and gas fields of the Science and Technology Commission are of very high quality, that is, they are very shallow from the surface and are easy to exploit. This has also caused a consequence - it burns particularly fiercely!

How fierce it was, the situation at that time was: black smoke from the Middle East could be seen on the pictures of outer space returned from artificial satellites launched by countries around the world!

Our Great Wall has long been known as the only man-made object in outer space that can be seen with the naked eye. However, the scene of the burning oil and gas fields in the whole territory of the Science and Technology Commission is obviously much more shocking than that of the Great Wall!

Putting aside the economic losses at that time, it was the process of igniting the oil and gas field, which even frightened the classmates who ordered the ignition at that time!

So, on the other hand, the oil states of the Persian Gulf, although they are countries that make money lying on liquid gold, are at the same time lying on explosives.

Xu Liang has a certain level of understanding of the Gulf War in history, so when Duan Han mentioned igniting fossil fuel mines, his first reaction was to be very serious.

That's right, Duanhan did open up a new idea for the formation of a tsunami!

Without using a nuclear bomb, but only using fossil fuels, as long as the amount is sufficient, it can also cause the same effect as a nuclear bomb!

No problem!

This is like the two atomic bombs dropped on the island country during World War II, one equivalent to 40,000 tons of TNT-equivalent explosives, and the other equivalent to 55,000 tons of TNT-equivalent explosives. So, what if the United States did not drop an atomic bomb, but directly dropped 40,000 tons of TNT-equivalent explosives? Although there is no such large plane that can fly tens of thousands of tons of explosives over, if tens of thousands of tons of explosives are piled up, will the explosion effect be the same as that of an atomic bomb?

Obviously, the energy of the total oil reserves in the Persian Gulf region to explode together is much greater than that of an ordinary nuclear bomb explosion!

That's enough fossil energy to last the world for more than 50 years!

This is not the end, at this time Duan Han said an even more amazing thing:

"Lao Xu, in the depths of the world's oceans, there is another fossil fuel that is quite evenly distributed. If all of this fossil fuel were extracted, it could be used by current humans for 970 years. ”

Xu Liang: "How much is nine hundred?" ”

Duan Han: "Nine hundred and seventy years." ”

Xu Liang: Xu Liang silently made a comparison, which can be used in 50 years compared to 970 years, which is nearly 20 times worse.

So the question that came to his mind was: What if all this fossil fuel exploded?

Xu Liang: "What kind of fuel is this?" ”

Duan Han: "Methane hydrated." ”

"There's also a more popular name – combustible ice."