It's reasonable for me to have a two-way foil for a second-level civilization, right?

Fang Xu's voice was full of exhaustion: "The atmosphere of Dawn Star has basically stabilized, and the second stage of transformation can begin."

Like Fang Xu, Lu Yongchang's face was full of tiredness at this time.

During this week, in order to ensure that the atmosphere of Dawn Star successfully enters a self-circulating stable state, every scientific researcher in the Academy of Sciences has been staying up all night.

Fortunately, their efforts have paid off.

So far, the atmosphere of Dawn Star has successfully entered a stable self-circulation state.

A new water cycle system has been successfully established.

Until now, the first step of the dawn star transformation plan has been completed!

The next step is to modify the atmospheric composition of Dawn Star.

The modification method is also very simple.

"Prepare to launch the Atmospheric Reformer No. [-]." Lu Yongchang rubbed his face with his hands, and gave the order after forcing himself to cheer up.

"The launch standard is strictly implemented according to the plan."

……

A week later, the port gate of City No. [-] opened again.

This time, what came out was not a drone, but Xuannv No. [-] neatly arranged.

Among them, a familiar voice came from the leading ship, Xuannv No. [-].

"It's possible to leave the city!"

Hong Fan's distinctive voice echoed in the cockpit: "I have to take a good look at our new home!"

"Be serious."

Before Hong Fan could continue speaking, Bai Yixuan who was sitting in the driver's seat raised his eyebrows and interrupted him: "This is not for going out to play."

"If something goes wrong in the atmospheric renovation plan, let alone me, even Commander Zhao can't keep you."

Hearing this, Hong Fan curled his lips subconsciously.

But thinking of Lu Yongchang's extremely serious attitude before leaving, he straightened up, straightened his expression, reached out and pressed a few buttons.

"The destination has been determined and the route has been planned."

The electronically synthesized voice of the weak artificial intelligence one on board: "It is about to start accelerating, please fasten your seat belt..."

……

The former Dawn Star A3 area is now the new Pacific coastal area.

A black Xuannv No. [-] crossed a graceful curve and hovered slowly above the sea.

"Call command center."

"I have arrived at the target location, and I am ready to release the Atmospheric Modifier-[-] at any time."

Bai Yixuan said in a deep voice.

"Approved to launch."

There was hardly any delay, and zero electronically synthesized tones came from the radio.

The moment he heard the command, Hong Fan, who was in charge of manipulating the delivery device, pressed the virtual button on the holographic projection without hesitation.

"Atmospheric Transformer 1, put in [-]% of the dose."

next second.

The cabin of Xuannv No. [-] trembled slightly, and the hatch of its abdomen opened suddenly.

The light green substance slanted down from the hatch, splashing huge waves on the slightly wavy sea.

The so-called Atmospheric Reformer 154 is a genetically modified cyanobacteria-like creature from the Ross [-] star system.

After genetic modification, they not only retain their original extremely strong nitrogen fixation ability, but also strengthen their photosynthesis ability and reproductive ability.

Ideally, the cyanobacteria released in this operation can cover all the waters on Dawn within one year.

In order to prevent its overgrowth, Academician Mao Zhengzhi painstakingly added a "self-destruct gene" into its genome.

When the external oxygen content reaches the preset standard, these cyanobacteria-like organisms will immediately start the self-apoptosis process.

Within a week, all cyanobacteria will die.

As for the "corpses" after apoptosis, they will become the first batch of fertilizers on Dawn Star, creating a perfect growth environment for the subsequent earth creatures.

It can be said that the Atmospheric Reformer-[-] is the magical weapon for human colonization of alien planets in the future.

However, among the countless shining points, there is another disadvantage that cannot be ignored-it has extremely harsh conditions for the planetary environment.

First of all, the colonized planet needs a lot of water resources.

The more water resources there are, the faster the transformation of the planet's atmosphere will be.

Secondly, as a nitrogen-fixing organism, there must be sufficient nitrogen in the atmosphere of the planet.

Of course, there must be a certain amount of carbon dioxide in the atmosphere, otherwise, these cyanobacteria-like organisms lack the raw materials for photosynthesis, and it is impossible to produce oxygen out of thin air.

These rigid conditions greatly limit the size of its performance stage.

It is precisely because of this realization that the project to improve the Atmospheric Reformer No. [-] has been completed long ago.

"Atmospheric Reformer No. [-] has been launched." Bai Yixuan checked the storage of the warehouse and reported again.

"Scanning algae density in the target water area, please wait..."

The moment Zero's electronic synthesis sounded, the scanning instrument on Xuannv No. [-]'s abdomen was automatically turned on, continuously scanning the sea below.

After a few seconds.

"The density of algae has reached the standard, and nutrients should be added immediately."

"The delivery ratio has been calculated."

Hong Fan glanced at the holographic image in front of him, and carefully adjusted the parameters of the delivery device.

After checking several times, he reached out and pressed another virtual button.

"The nutrients have been delivered." After confirming the success of the delivery of nutrients through the shipboard camera, Bai Yixuan reported again.

"Confirmed." After waiting for a while, the electronic synthesizer sounded again.

"A3-c008 area delivery goal has been completed, please immediately go to A3-c009 area to complete the delivery task."

Xuannv No. [-], which had stayed for a long time, had a slightly brighter blue light at the tail, and left the spot in a graceful arc.

The camera moves down slowly.

In the blue new Pacific Ocean, a cloud of green matter is slowly spreading.

Not long after, the sea water returned to its original transparent and clear appearance, and it looked as if nothing had happened.

However, in the world invisible to the naked eye.

Under the sunlight, strings of fine air bubbles emerge continuously from the shallow seawater.

After surfacing, the bubble burst suddenly, and the gas contained in it also entered the atmosphere of Dawn Star.

……

March 2386, 6 in the Earth calendar.

People's Union Academy of Sciences Headquarters.

Lu Yongchang stood quietly in the command hall, looking at the holographic image in front of him.

In the huge holographic projection, real-time images from satellites are projected.

Different from the Dawning Star a year and a half ago, the Dawning Star at this time presents an extremely weird color tone - yellowish brown mixed with green.

The yellow-brown color is naturally the bare land on Dawn Star.

The green one is the ocean area of ​​Dawn Star.

After a year and a half of development, the ocean on Dawn Star has been completely occupied by Atmospheric Transformer [-].

All the time, they are absorbing nitrogen from the atmosphere and converting carbon dioxide into oxygen through photosynthesis.

"Professor, there is some bad news."

The avatar of Zero slowly emerged beside Lu Yongchang, and the familiar electronic synthesis sound came out from the speaker.

Chapter 456 Carbon Dioxide Shortage Crisis

Lu Yongchang didn't speak, but just cast a puzzled look at the holographic simulated image beside him.

"There's not enough carbon dioxide in the atmosphere."

Report concisely and concisely.

Although I thought of countless possible situations that might happen,

But when he heard Ling say these words, Lu Yongchang couldn't help but fell into deep thought.

Not enough carbon dioxide?

What the hell?

"Is the steel mill shut down?" Lu Yongchang subconsciously asked.

Under the scouring of the torrential rain brought by Nero, countless hematite powders were washed to the river and the river's estuary, which brought great convenience to human beings.

As early as a year and a half ago, when the Atmospheric Transformer [-] was launched, the construction of a steelmaking plant began on Dawn Star.

Under the construction of the robot, tall chimneys rose one after another soon on the Dawn Star.

In order to speed up construction and smelting efficiency, the style of each steelmaking factory is extremely rough.

A large amount of hematite powder is thrown into it.

At high temperature, hematite reacts with carbon to produce a large amount of iron and carbon dioxide.

According to the initial calculation results, the hematite on Dawn Star is enough to provide enough carbon dioxide for the atmospheric modification plan.

"No." Zero quickly denied, "All steel plants are working normally, and the rate of carbon dioxide production is in line with expectations."

"Then why..." Lu Yongchang's eyes became even more puzzled.

"It's a problem with Atmospheric Reformer One."

A sound of footsteps came from behind, followed by Mao Zhengzhi's voice.

"Atmospheric reformer?"

"Yes." Mao Zhengzhi walked unhurriedly to Lu Yongchang, raised his head and looked at the slowly rotating Dawn Star satellite image in the holographic projection directly in front of him.

"Probably because of the influence of the overweight environment."

"Or maybe it's because of the high-concentration nitrogen environment."

"Or maybe it's for some other reason..."

"We are looking for the specific reason."

Mao Zhengzhi shrugged, and spread his hands helplessly: "In short, we found that the "working efficiency" of the Atmospheric Reformer No. [-] in the Dawn Star Ocean is much higher than that in the laboratory."

Lu Yongchang suddenly realized.

"That is to say, the speed at which carbon dioxide is produced by the steelmaking plant can no longer keep up with the conversion speed of Atmospheric Reformer [-]?"

Mao Zhengzhi nodded: "This is roughly the situation."

"According to the current decline rate of carbon dioxide in the atmosphere, it is estimated that in another month, Atmosphere Reformer [-] will stop photosynthesis due to the low concentration of carbon dioxide."

"By then, the completion of the Atmospheric Modification Program could be significantly delayed."

Lu Yongchang frowned slightly, and then quickly relaxed it.

"In that case, just make a lot of carbon dioxide."

For the current human civilization, this is not a difficult task.

It was also because of this that Mao Zhengzhi came to chat with Lu Yongchang in a leisurely manner.

"What are you going to do?" Mao Zhengzhi asked curiously with his eyes moving slightly.

A relaxed smile appeared on Lu Yongchang's face.