What the hell is this, Fang Chen stood up, waved his left arm lightly, and the surface of the river a hundred meters behind him suddenly rolled up waves, following the movement of Fang Chen's arm, he rushed up directly, and hit the qi wall not far from them.

The water dragon was imposing, and with the momentum, it crashed through the thick air wall, and the waves splashed in all directions, and the air wall that was close to the ground around the explosion cracked and flew.

Everyone was amazed that Fang Chen's ability to control water had increased by leaps and bounds, and at the same time, they watched as the blasted qi wall slowly gathered together after the water dissipated......

This thing has a monster from the roots!

From standing on the river, going deep into the clouds to isolate the north and south, to now falling to the ground, for three days in a row but not ending, everywhere is talking about their unusualness.

As they walked, they looked at the thick wall of qi lying on the ground.

Countless methods have been tried, but they can only break it up but not destroy it, and just when they secretly think that this thing may have to be made in heaven, it ...... Scattered on their own.

Scattered silently, disappeared without a trace overnight.

The next day, when they got up from the ground, they didn't even notice it at first, until they tried to break through the wall to find the crushed meat, only to suddenly realize that they had stepped on the ground.

There was no feeling at all, Fang Chen was frightened and secretly glad at the same time, this thing was a dead thing, it was just ...... It is so powerful, will it just go so simply and quietly?

Answer...... Of course not.

The qi wall was gradually dissipating, and when they stepped on the ground, the qi wall in the distance was still falling.

On the first day of the collapse of the qi wall, they did not fail to notice that something was wrong, as if this qi wall was here to show a majestic style, and now that the majesty had passed, they happily floated away.

But by the next day, they felt the changes around them.

Chen Lin wiped his face, shrugged his nose vigorously, and said while scratching his head, "It's a little cold!" ”

Cool? Where is it cool? From this wall of air fell, they went straight from winter to summer, how cold!

Hey? It's really a little cold, and as soon as he finished speaking, he was slapped in the face, and several people slowly turned around a few times, and they did feel a chill.

But I didn't feel the change in the temperature around me, because after walking a few laps, the sweat on my head followed.

Fang Chen stood up, his eyes narrowed slightly at the qi wall in the distance, this cold was not because the temperature had dropped, but ...... The air became colder, at first, Fang Chen thought that the humidity in the air had increased, but after taking a deep breath, he shook his head.

It's not that the humidity has changed, it's that the oxygen content in the air seems to have increased.

It has been raised to a concentration that makes people feel a slight coolness when breathing.

In addition to Fang Chen's heart, lungs and brain, which had become extremely comfortable because of the increase in oxygen content, his heart sank violently.

Most people may not have a very specific concept of the increase in oxygen content simply speaking, but in the entire history of the natural world, the most famous stage of the record of a large increase in oxygen content is the age of the dinosaurs.

At that time, marine life was going through the stage of transition from aquatic to amphibian, herbivorous dinosaurs on land, and the surface vegetation quickly multiplied and grew in the absence of natural predators, and the vegetation coverage rate once exceeded 90%.

A large number of primary forests produce a large number of oxygen molecules through continuous photosynthesis, raising the oxygen concentration of the entire surface to an all-time peak.

During this period, the most affected and significant change in oxygen concentration was the size of the animals at that time...... It's all getting unimaginably bigger!

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