Through the war with the alien race, now in Qiming City, the fifteen million remaining human beings on the earth have been fused into one, fighting side by side and performing their own duties, so that they can quickly become a collective, which is also one of Liu Xingchen's purposes for letting human civilization fight against aliens, rather than directly bringing it to space for stable development.

Now human civilization, has quite a scientific and technological civilization of the face, the functions of various departments are complete, orderly, people live a convenient and wealthy life, all of them are bound to a smart terminal, intelligent terminals can not only prove identity, but also communication, entertainment, payment and other functions, covering every aspect of life.

When the question of how to clean up the earth was raised to the whole people, the discussion quickly filled the social section of the entire virtual network, and after the surprise of coming to space for the first time, most people began to miss the solid earth under their feet.

Human beings are full of affection for the blue planet located below Qiming City, and they all hope to return to the ground as soon as possible, so people are very enthusiastic about it.

The people of the Academy of Sciences are also discussing fiercely, because when the Academy of Sciences was first established, everyone was studying, and there were not many people who could be called real scientists, and there was not much difference from other people.

Therefore, while discussing on their own, the people of the Academy of Sciences are also paying attention to everyone's conclusions, in order to find feasible solutions, and they will evaluate these solutions and formulate a plan with the best effect and the most feasible according to the technology that mankind has now.

Although information about birds, insects and aliens, as well as technical information already in the possession of humans, has been transmitted to a public information database and can be consulted by the public at will, the proposals put forward are still strange and varied.

There are those who propose flooding the earth, those who drag asteroids to hit the earth, and those who smear the earth with oil and then set it on fire.

The more reliable ones include those who release biochemical viruses to exterminate birds and insects with poison, those who use nuclear weapons to bombard the entire earth's surface, and those who propose to block the sunlight projected on the earth and let ultra-low temperatures exterminate the earth's creatures, and so on.

The scientists considered these options in a comprehensive manner and ultimately rejected them because they were either ineffective, ineffective, or not feasible.

For example, those who proposed flooding the earth with large amounts of water probably did not consider that there are creatures such as sea tribes on the earth; And dragging an asteroid to hit the earth, you think that the bird and insect are dinosaurs, and you will destroy it if you say it.

Also, ultra-low temperature cannot kill all living things, and in the same way, nuclear weapons cannot kill all living things on the earth, you know, there are living things on the surface of the rock layer at a depth of 10 kilometers underground, and at the bottom of the sea at a depth of thousands of meters, unless the entire earth is blown to pieces, but if it is blown to pieces, there will be no earth for human beings.

Only the one that released the biochemical virus seems to be the most reliable, but what is the bird insect, the bird insect is a biological civilization that goes to the interstellar world, a creation only developed for war, although that biological civilization is not low-level in Liu Xingchen's eyes, but their biotechnology is not comparable to today's human beings.

Now the birds and insects have undergone a preliminary transformation, becoming the Void Zerg that those interstellar civilizations are afraid of, with the little biochemical technology that human beings have mastered now, using viruses to kill birds and insects, no matter how you look at it, it is beyond your strength.

In short, the national discussion for two days, did not find an effective way to clean up the earth, it seems that human science and technology can not do this, but Liu Xingchen has made it clear that let the existing technology of human civilization be used, which makes scientists very distressed.

Soon after, someone had a flash of inspiration and thought of using reverse thinking to find a solution:

The purpose of cleaning up the earth is to kill all the birds and insects on the earth, and now there are birds and insects in every living thing on the earth, so in the final analysis, it is to exterminate all living organisms on the earth!

And what is the most universal way to kill organisms on a large scale?

It is nothing more than high temperature and strong radiation, which together are high-energy reactions.

However, the earth's environment is complex, and it is difficult for human beings to penetrate into every corner of the earth with high temperatures or strong radiation that humans can produce now.

So the question is back to square one.

But there is one person who has grasped the key point of the problem, and he is the chief scientist of the Academy of Human Civilization - Xia Yan.

That's right, this guy who killed all sides at the beginning didn't go to the War Department, but went to the Academy of Sciences, and his brain, which can increase his ability by ten times, is really wasteful just for fighting.

Xia Yan saw high temperature and radiation, and first thought of nuclear weapons, and the reason for the high temperature and radiation of nuclear weapons is the nuclear reaction of the internal matter at the time of explosion, nuclear weapons are a technology mastered by human beings, but nuclear reactions do not only exist in the explosion of nuclear weapons.

Outside, Xia Yan raised his head and saw the soft light of the sun through the protective cover of the base, and he knew that if it was not filtered by the protective shield of the base, the sunlight would not be soft at all.

"You mean, borrow fire from the sun!"

Those who can enter the Academy of Sciences are smart people, as soon as Xia Yan proposed it, after a little analysis, everyone felt that this plan was the most feasible at present, and if it was grasped well, the effect was also the best.

The key is how to borrow fire, the diameter of the sun is 1,392,000 kilometers, and the distance from the earth is about 150 million kilometers, which is a rather long distance, and even the light in a vacuum to complete this distance takes about eight minutes and twenty seconds, and you can't tell the sun directly:

'Hi buddy, borrow a fire'.

Installing a high-thrust engine on the earth, changing the orbit of the earth, and pushing the earth into the sun, human technology can indeed do it today, but it is easy to propulsion, but it is difficult to pull it out, and it is even impossible to pull the earth out of the sun.

Soon someone thought of gravity, which uses the sudden gravitational pull to pull a part of the sun near the Earth.

But in order to produce such an effect, the gravitational force required will be so huge, and it must be able to appear and disappear instantly, and the direction must be controllable, which requires artificial control of the force field, and it can produce a strong equivalent gravitational force in a resting state without passing through a huge mass, and human beings do not seem to have mastered this technology.

It is true that human beings have not mastered the force field control technology, but everyone in the Academy of Sciences knows that human beings have this technology, and it is also applied to the base of Qiming City, but it does not mean that they can use this technology, because human beings have not mastered it, and Liu Xingchen does not allow them to use it at will, which is also urging them to learn and study on their own.

Therefore, the scientists among the earthlings began to conquer this technology, and under the active learning of the scientists, Liu Xingchen did not hide his selfishness, and was really like a mentor, carefully explaining the principle of force field control technology to them.

But knowing the principle does not mean that you can really master it, but it will take many detours, and many basic technologies of human civilization are not complete, and there will only be more problems encountered.

Scientists have been working day and night to overcome the problems encountered, especially Xia Yan, who has been working on his own ability, and several times because he was too involved in research, he forgot to supplement high-energy food in time, resulting in the exhaustion of energy in his body and his collapse at work.

Scientists use the newly built supercomputer to perform calculations and analysis, and conduct particle collision experiments in the virtual world with the accelerated orbit around the solar system (the experimental data is available to Liu Xingchen, so the experimental results are consistent with the actual situation. and get the data yourself.