Qu Jie hid in the Yukun Cave and lived a stable life, while the outside world quickly entered a state of collapse of the world's ecological cycle as she expected.

To put it simply, mass extinctions.

Although species extinction has been talked about for a long time, and it has been happening continuously, there are many species extinctions every year, but this extinction is comparable to the last mass extinction.

It was that time more than 60 million years ago.

The age of dinosaurs ended with this.

Nearly 80% of the world's species are completely extinct.

Although not so many species have disappeared yet, the collapse of the entire ecological cycle has just begun.

It is believed that with the passage of time, the number of species that will eventually become extinct will definitely not be less than the last time.

And the causes and consequences are actually very easy to sort out.

In this world, many species have relatively weak adaptability to the environment, and sometimes a temperature difference of one or two degrees may lead to a certain species, so mass extinction, and may also lead to an extremely terrifying gender imbalance in a certain species, accelerating extinction.

For example, many reptiles that resemble turtles do not have a predetermined sex, but rather are determined by temperature during the hatching process.

Once there is an imbalance in temperature, it is normal for the next generation to have a large gender imbalance.

Other factors include changes in ocean currents, changes in ocean water temperature in some areas, submarine volcanic eruptions, accumulation of volcanic dust, increased air pollution, and various natural disasters......

and even changes in the oxygen content of seawater.

will be devastating to some species.

Animals are different from humans, humans can wear clothes when they are cold, they can hide in the house, they can turn on electric blankets, burn kangs, turn on air conditioners, and bake fires to keep warm.

When it's hot, you can also take off your clothes, turn on the air conditioner, turn on the fan, and use ice cubes to lower the temperature and soothe your body and mind.

Even if the temperature changes slightly, for example, the winter is one or two degrees colder than usual, and the summer is one or two degrees hotter than usual, it is not a big problem, and you can basically rely on all kinds of tools and even scientific and technological creations to carry it.

But animals can't.

Not to mention wild animals, that is, pigs raised in captivity, when the temperature is extremely hot in summer, if you don't turn on the air conditioner, or don't cool them down, they will die of heat, who in the wild to cool them down?

Originally, the living conditions of those wild animals, although they have become worse and worse because of human activities, at least they have not been bad enough to basically extinct level, but with the increasing number of natural disasters and more and more serious, human beings can still rely on various scientific and technological creations to resist natural disasters, or reduce losses and casualties.

But the animals are really fine.

Not to mention, those countries that have meteorological satellites except for Xia are constantly transferring their domestic natural disasters to other places at will, which undoubtedly makes the climate fluctuations in many places particularly serious.

In particular, uninhabited marine areas are the hardest hit areas, the hardest hit areas for large-scale species extinctions.

Frequent natural disasters, excessive climate change, and ecological destruction lead to species extinction, which will indirectly make the entire ecology become worse and worse, and even break a large number of food chains, such as the mass extinction of krill, which undoubtedly makes many animals in the ocean that rely on krill to survive also starve to extinction on a large scale.

The upper food chain of those animals continues to become extinct.

Or having to change your eating habits.

In this world, many things are linked one by one, and a problem in one link will inevitably lead to a chain reaction, as the mass extinction of species spreads more and more widely, more and more extinct species, including a large number of seaweed plants have also begun to die, the global oxygen concentration continues to decrease, and the carbon dioxide concentration is rising.

And the oxygen concentration decreases at first.

The rate of extinction is even faster.

Although the meteorological satellites of various countries are still operating, whether it is the reduction of oxygen concentration, or the fragmentation of the food chain, or the global temperature increase in summer, the temperature in winter decreases, and the terrifying cold wave hits, meteorological satellites are powerless.

Meteorological satellites can disperse clouds in a small area, or divert a small area of cold currents, but it cannot disperse the cold currents that sweep across the country or even half of the planet, so when the climate is so bad that half of the planet is swept by a terrifying cold snap, no matter how many meteorological satellites there are, there is nothing to be done about it at present.

It can only be resisted by other methods.

But when people are exhausted, the so-called people will win the day, at most they can only overcome some small disasters and small difficulties, and when faced with real terrible natural disasters, they are still powerless.

So the next step is naturally a reduction in grain production.

Even the harvest is lost.

and a large number of human deaths.

The previous days can only be regarded as the prelude to the end of the world at most, until this moment, the real end of the world can be regarded as a complete come, human years of scientific and technological development, arrogance, swept by the natural power, and ordinary animals are not much different, are just ants.

At this time, some countries started wars.

I know that I am dying, but I still have to go crazy.

There are also countries that completely abandon civilians, either hiding in the doomsday base with their elites, or taking the powerful to sit on the doomsday aircraft carrier, Noah's Ark, or even directly take a rocket to enter the space station and live temporarily.

Xia Guo is actually no exception.

The main difference between them and those countries is that they have built more doomsday underground bases, but even so, the number of people who can live in them is limited, and they can only give priority to sending elites, young people, and children to the underground bases, while the rest of the people live in the same ground.

Relying on the latest scientific research results.

Barely able to withstand natural disasters.

At the same time, due to various reasons such as lack of materials and inconvenient transportation, the major bases are basically in a state of autonomy, and the original order has begun to collapse.

Just a few years down.

The total global population has fallen to less than one billion.

And this is not the end, the reality tells all mankind that the next step is not ups and downs, but ups and downs, and in the following year, there have been many desperate natural disasters, so desperate that many human beings have died directly and do not want to live a hard life anymore.

For example, the world's largest volcanic eruption, volcanic dust obscured the sky, causing the global average temperature to drop by two degrees again, and a large number of plants died due to the loss of sunlight.

For example, the 12-magnitude earthquake on the peninsula continent shattered the entire continent and sank to the bottom of the sea.

Another example is the disorder of the magnetic field, and a large number of satellites have lost contact.

The infrastructure is badly damaged, daily communication is blocked, and even the Internet is basically unusable.

In short, humanity has entered its darkest hour.