[At the beginning of the 4th year of the era of crisis, one of the defense plans]

It wasn't until this year that humanity really began to implement its plan to combat the pollution crisis.

According to statistics, most of the places on the ground that can still survive only occupy one percent of the earth's land area, and most of these one percent are places with barren mountains and mountains. Although the dungeon can give people a satisfying life, the capacity of the dungeon is still too small, and people can only move into the dungeon partly and partly. In the aftermath of the acid rain crisis, some of the people who were temporarily hiding in the dungeon were forced back to the surface, because the current volume of the dungeon is still too small, and it is still being reclaimed and expanded. At present, there are more than 3 billion people in the world, of which more than 1.5 billion are crammed into the barren mountains and mountains.

In order to solve this kind of problem, the HPC decided on two policies at the end of the third year of the Crisis Era, but because people did not want to repeat the mistakes of the "Starfield" team, the plan for alien colonization was not accepted by the public. The HPC Strategic Bureau has put forward a proposal to slightly revise the "clean-up" plan to address the problems of living resources and space.

"Comrades, we want to open up the ground on the ground, what can you do about it?" Courg, the director of the Bureau of Strategic Work, said as he slumped in his chair. Coug is actually very young, but he looks a little old from the outside, and there are not many small mustaches on his chin, which is very clean, "Think about it, is there any way not to?" ”

Coog exhaled a puff of white smoke that seemed to plaster the faces of every colleague. That string of smoke, in the air, passed in front of every colleague. Several coughs rang out in the room. No one was silent, and a dead silence enveloped the room.

At this moment, a man spoke, and everyone looked at her with special eyes, as if they did not know her.

A fresh, feminine female voice spread out from the last row, like a small stone thrown from the water, and the surface of the water suddenly rippled.

"You can change the principle of the 'clean-up' plan a little bit, and change those small nanorobots that eat pollutants into nanomaterials...... Lin Xifei said with a smile on his eyebrows.

"Is it made into nanomaterials? At that time, the sky was full of nanomaterial filaments, wandering like nematodes in the air, like plankton in the water. However, at that time, people's original pollution problem was not solved, and the problem of nanomaterials like fibers had to be solved. Lynn smiled contemptuously. At the same time as the words were finished, the laughter in the conference room suddenly became a big pot of porridge.

"Quiet!" Coog said with a grim face, without the slightest smile. As if in his world, there is no such thing as humor.

"Listen to me, after the nanomaterials are ready, connect them and turn them into an invisible wall, and place it in a certain place, in a big circle, so that a livable area can be developed in the polluted area." Lin Xi said calmly. For these ridicules, Lin Xi was used to it.

Lin Xi was born in a farm family, and his parents were both mechanical employees of the farm. Lin Xi went to the farm every day to inspect the machines that cultivated crops, and spent a considerable part of his childhood working. Today's crops are no longer the same as before, with large fields of farmland growing a variety of crops. At present, due to the lack of resources and the harsh natural environment, crops are not easy to grow, so they can only be cultivated by machines and urged to grow, or directly synthesized into food. Lin Xi has been dealing with these grain machines since he was a child. When one day, when Lin Xi was determined to study knowledge, others laughed at her, saying that she couldn't do it well. In fact, among a considerable number of them, they have failed in their studies. But Lin Xi disagreed, she didn't want to be like her parents all her life, taking care of machines on the farm, and then just holding a microscope to look at ears of wheat and rice. Then I worked hard and studied hard, and finally ran to get admitted to the university, and found a job after graduation. At first, I worked as a physics teacher for a few months, but then the school was closed for a long time due to some disasters. So she quit her job and was later introduced to HPC's Strategic Planning Bureau by her high school classmates who previously worked in the HPC Strategic Planning Bureau.

"Hehe," Lynn said with a smile again, her previous smile still there, and her current smile was superimposed on her current smile to become a bigger smile. "Then please, it must be interesting to build dozens of such large-area nano wall circles in the polluted area, and maybe you can even spell out an Olympic ring logo!"

There was a loud burst of laughter in the room, as if the floor was about to shake, the glass was about to shatter, and then it fell to the ground and became fragments in a burst of laughter.

"Go on." Coog said to Lin Xi in an unchanged tone. Lin Xi continued in a sea of sounds, and to hear her speak was like finding a drop of water of different colors picked up from the waves in the monstrous waves. But Lin Xi ignored it and continued. "After the nanowall is built, it can effectively resist pollutants (this is called the 'defense plan'), and then the dust and dirt inside can be removed until people are fit to live."

"Not bad!" Coug's frosty face finally smiled. The laughter around him also stopped abruptly, casting envious eyes.