In the evening, after eating a warm and delicious dinner, chatting with the family for a while, and taking a hot bath, Tianming returned to his room.

Locked the door of the room, took out the door of space, and went to Blue Mercury first.

Quickly returning to Earth from Blue Mercury, Tianming had an extra rune crystal in his hand - a space gate to a small space.

This means that from now on, the earth will become a transit point to Blue Mercury and small space, and the center of gravity of Tianming's development will also begin to shift to the earth.

"Let's start pumping air."

A teleportation, Tianming appeared in the wilderness four or five kilometers away from the village.

One reason why the earth's air is pumped and added to a small space is that the earth's atmospheric composition is more suitable for the survival of earthlings and can be used directly, and the second reason is that the content of carbon dioxide in the earth's atmosphere is higher than that of blue mercury, so that Tianming can extract carbon dioxide very lightly.

Of course, there are a lot of sulfides, nitrides, and many small microorganisms and dust particles in the air of the earth, and these harmful things to the human body cannot be brought to a small space.

Therefore, when the air is pumped out in the morning, these harmful substances are filtered, and only pure nitrogen, oxygen, carbon dioxide and noble gases are retained.

In particular, Tianming deliberately extracted some more carbon dioxide, and the concentration of carbon dioxide in the compressed earth air reached 2%, which is more than four times higher than the 0.04% carbon dioxide concentration in normal air.

The extraction lasted for more than two hours, until the space was filled with liquefied compressed air, and he stopped extracting.

Back in the bedroom at home, open the door of the space, and Tianming entered the small space.

The small space is quiet as usual, and the wind and sun are beautiful. But since today, a lot has changed.

Open the ability space, Tianming released all the compressed air inside.

The volume of the atmosphere in a small space is about 1,200 cubic kilometers, and Tianming replenishes the equivalent of 10 cubic kilometers of earth's air at a time, which can increase the atmospheric pressure of a small space by 1%.

If you want to make the small space pressure reach the same range as the earth, Tianming will have to do this at least 30 times.

In order to speed up the progress, Tianming went out again. Two hours later, he replenished the air to the small space again, but this time, in order to be fast, Tianming did not increase the carbon dioxide content, but filtered the earth's air and directly filled the small space in equal proportions.

Looking at the barometer in his hand, Tianming said: "The atmospheric pressure is 0.69 standard barometers, and it can only increase by 0.01 points at a time, it seems." Thirty more trips. ”

Tianming felt that this efficiency was too low, and felt that next time he would directly use the static field space to compress the earth's air, compressing 10 million tons at a time, and he would only need to run three times to get it.

"It's a little tired. Take a break in the small space and the rest will be done tomorrow. ”

Spread a mat on the grass, cover your face with a breathable and light-blocking white cloth, and lie down. I slept for 12 hours.

"Hey, the ability space has increased by more than 100,000 cubic meters, so fast?"

After waking up, Tianming was a little surprised. Normally, when I was on Blue Mercury, the ability space would grow by 340,000 cubic meters a day, but I didn't expect it to increase by 100,000 cubic meters after sleeping in a small space.

Tianming found that the larger the ability space, the more spatial runes it could absorb, and the faster it would grow.

Just like a magnet, the larger the magnet, the stronger the magnetic force must be, and the more fine iron filings can be absorbed.

It's like a fishing net, and there are certainly a lot more fish caught in a big net than in a small net. If the ability space is a fishing net, then the space runes are fish, and the ability space is larger, and the space runes that are "caught" will naturally increase, which is a law of equal proportional growth.

"It seems that in the future, you should cultivate more in a small space."

……

The next day, Tianming went to a nearby uninhabited hill to extract air from the earth's atmosphere.

After dinner, after the family had rested, Tianming entered the small space and repeated yesterday's operation.

"Atmospheric pressure: 0.83 standard air pressure, the effect is good, it seems that today is not in vain, tomorrow may only need to run again."

On the third day, another busy day, Tianming not only compressed fifteen million tons of earth's air, but also brought Tianlin into a small space.

However, as soon as he entered the small space, Tianming was a little surprised.

The first is the temperature, which is a little hotter than usual, and the thermometer shows that the current temperature: 28.5 degrees.

"When I came in yesterday, it was only 26.4 degrees, why did it rise so much today?"

"Brother, the air itself has the ability to absorb and reflect heat radiation, after you add a lot of air to the small space, this heat preservation ability is enhanced, a large amount of heat can not be dissipated, and the small space is closed, the result of the guide zhì is naturally the temperature is getting higher and higher, brother, hurry up and find a way to lower the temperature, otherwise the temperature will definitely get higher and higher." Tianlin Road.

"Cooling? How to drop? Small space is not big, but it is not small. ”

Tianming was a little panicked, if the temperature really kept rising, it would be a headache.

"Brother, can't you fly outside the small space? You can cover the top of the small space with a blackout cloth, or lay a layer of low-transmittance glass to reduce the amount of photons penetrating, which is a good solution. "Tianlin Jian yì said.

Tianming nodded: "Your method is good, do as you say." ”

Tianming hurriedly synthesized a batch of light-blocking glass, about 60 square kilometers, and came to the small space, and laid these low-transmittance glasses on the surface of the small space, about half of the area.

Returning to the small space, looking up at the shading effect of the dome, Tianming said: "It's cloudy this day, the brightness has been reduced by at least half, and there should be no more heating problems in the small space." ”

The problem of temperature was temporarily solved, and Tianming also found a good phenomenon.

Plants in a small space grow much taller in the past few days when the air pressure increases.

He clearly saw that not only the sleeping grass, the six-leaf clover, and the star grass, but also the jujube tree and the kapok tree, had grown taller. Among them, the star grass is the most obvious, from the previous general height of 20 cm, to more than 30 cm, and some grow fast, close to half a meter high.

The same is true for six-leaf clovers, where the number of plants that grow taller, the leaves become larger, and even the number of plants that produce red fruits has increased a lot, which means that the yield of red fruits has increased.

Jujube trees. Clusters of white flowers bloom, fragrant and refreshing; The big red flowers on the kapok tree are more gorgeous than before; Even the giant sequoia trees in the giant red cedar forest seem to be growing taller.

The plants in the entire small space collectively glowed with a second spring and began to grow desperately.

Tianming was pleasantly surprised, but also surprised, this change was too big.

However, the pressure in the small space is still too small, and the compressed air in the ability space. It is still necessary to continue to add small spaces.

Seeing that Tianming was about to release air, Tianlin came over and prompted: "Brother, don't add oxygen to the small space anymore, the oxygen content in the small space is 25% now." Surviving in an environment with too much oxygen, the human body is prone to aging, and it is enough to maintain 21-22% of the Cheng dù. ”

"Okay, I got it. You take the oxygen meter and measure it, and I start to release air. ”

According to Tianlin, Tianming only released nitrogen, carbon dioxide, and rare gases. After more than 12 million tons of compressed air were released. The atmospheric pressure of the small space finally reached 0.96 standard air pressure.

The standard pressure is calculated based on the atmospheric pressure in the plain area, and the village is located in the western plateau, with an altitude of nearly two thousand meters, and the atmospheric pressure may be 0.9 standard pressure, not more than 0.95, that is, it can be said that it is just right to keep the atmospheric pressure of this range in a small space.

Tianlin pointed to the value on the oxygen meter and said, "Brother, the oxygen content is 21.7%, the dilution effect is very good, there is no need to put more oxygen." ”

I looked at the thermometer again: 27.2 degrees, the temperature was a little lower than before - this is also easy to explain, because the compressed air released by Tianming is basically in a low temperature of more than minus 200 degrees, and after being released into a small space, it absorbs a lot of heat, which has a good cooling effect.

This effect will not last long, and after a while, the temperature in a small space may rise to a high level due to the greenhouse effect.

"Brother, in fact, a place like a small space is an excellent place for agriculture, it has a long light time, more than 85% of the time, it is under sunlight, and the other temperature and humidity are suitable, and the soil fertility is also good...... Even the problem of high temperature is easy to solve, that is, energy transfer, so that plants absorb light energy, and then we consume plants to achieve carbon cycle and energy cycle, which is far more efficient than picking jujube and red fruit in a small space. ”

The meaning of Tianlin is to treat the small space as a large vegetable greenhouse, which can not only solve the problem of energy surplus, but also harvest more jujube and red fruits, which is much stronger than laying light-blocking glass outside a small space.

Tianming nodded, the method proposed by Tianlin is the best way to solve the problem, and it is necessary and inevitable to develop and utilize a small space with a larger range.

However, in such a comfortable and beautiful place as a small space, Tianming does not want to renovate or destroy any piece of grass or woods, and just maintain the original beauty to the greatest extent, and will not be demolished and rebuilt.

For the construction of Tianlin, Tianming has another good solution: expand the small space.

The spatial barrier of the small space is mainly composed of spatial runes, and the composition of the ability barrier of the ability space is not much different, as long as he adds the ability barrier to the space barrier, it is like adding bricks and tiles to the small space, so that it can be expanded, and finally it remains absolutely closed, so that it can be expanded?

In the specific operation process, Tianming first blew out a hole, then let the ability barrier dock with the space barrier, and then output a large number of space runes, without any problem, after consuming 200,000 cubic meters of ability space, Tianming opened up a new space with an area of about 10,000 cubic meters, 10 meters high, and 10 meters deep underground.

The new space is connected to the small space, which is equivalent to hanging a small car outside a large car. The exterior is closed and the interior is one, but it is no longer the cube it used to be.

The name of the new space is "greenhouse space", in order to keep the greenhouse space in a stable state, Tianming embedded "node runes" on the edges of several nodes, which are very similar to a kind of "buttons" or "zippers", which can make the greenhouse space present a solid and stable cube shape, even if a high-speed meteorite hits up, it will not disintegrate.

Because the greenhouse space has just been carved out, the ground is still steaming, and the red ground is barren, except for the stone is gravel, which is in stark contrast to the vibrant small space.

"Brother, this ......" Tianlin was surprised, after a while, the eldest brother opened up a new space?

Tianming crossed his waist with his hands: "Tianlin, a greenhouse space like this, I can make one in about two days, but to let this land grow plants, it is still necessary to transform the soil quality, you are an expert in this regard, when the time comes, you say I will do it, and strive to plant six-leaf clover and jujube trees in a short period of time, in the greenhouse space!" ”

Tianlin smiled bitterly, the eldest brother's ability was too rebellious.

But looking at the newly opened up tens of thousands of square meters of land, he also became excited: "Brother, this is our agricultural base, in the future, we can plant whatever we want; Plant as much as you want! ”

…… (To be continued......)