The reason why life on earth has appeared and survived is mainly due to the basic conditions for life on earth, such as oxygen, water, etc. However, with the change of the earth, the face of the earth today can be said to have undergone “earth-shaking” changes. Many people say that our planet’s ecosystem has moved towards an extreme mode, and it is indeed the case. Various extreme climate phenomena are affecting the survival of life.
High temperatures, droughts, heavy rainfall, severe storms, etc. are all raging around the world. According to a new study published by Science magazine, our planet is “drying out”, which is not a good thing for human beings. Once the earth “dry out” “The crisis of life will appear.
The earth is “drying out” and mankind is facing a water crisis
The research is based on data given by researchers from the University of California, USA, and a conclusion was issued in the journal Science. The scientists warned that according to the data, through the analysis of groundwater construction data from millions of wells around the world, humans are now Most of the groundwater on the earth has been used up, and almost half of the groundwater is used for agricultural irrigation. However, the use of this amount of water has reached a crisis state, and if it continues, mankind will face a crisis.
Researchers pointed out that up to 20% of the global groundwater wells are below the mark of about 5 meters, which means that in the next few decades, it is likely to become dry, and humans will face a water crisis. . In addition to human over-exploitation of groundwater, under the background of global warming, many regions have already experienced long-term droughts, so this is the common impact of humans and nature on groundwater resources.
Of course, from the side, in fact, the earth’s “groundwater” resources themselves are not many. In recent years, water shortages in many areas have been very obvious, but they need to be developed. Therefore, the excessive use of water sources can be understood. The irrational use of water resources by humans and irrational development are also leading to the depletion of water resources, which is the most critical. Therefore, the earth is “drying out”, and the water crisis facing mankind has been staged in many parts of the world.
How much water resources does the earth have and how much can be used?
According to human analysis of the earth, water is actually one of the most abundant resources on the earth. About three-quarters of the world is covered by water, which is about 1.386 billion cubic kilometers, but there are 96.5 of these water resources. % Is distributed in the ocean. The water that humans can use is only about 35 million cubic kilometers, so it accounts for a very small proportion. Many people may say, can’t this ocean water be purified and used? Indeed, this plan is also being implemented in many water-scarce areas today.
However, the cost of purifying ocean water by humans is too high, so nowadays it is mainly water resources that are limited in use and can be directly used. Groundwater is the largest mining area of human beings. Therefore, the increasing use of water by humans will only lead to a shortage of water resources. Eventually, human beings may really face survival problems due to water resources. This is why the scientific community continues to advocate the rational use of water resources. Once water resources are lacking, the foundation for supporting life is gone.
Of course, many people say that human beings are now looking for a “second earth” to survive? Martian immigrants may appear in the future, and they are getting closer and closer. At that time, humans will change Mars into the “second earth”, and humans can also develop the water resources of Mars. It is indeed good to have such an idea, but Mars is really transformed, according to scientists, it will take hundreds of years, so now this batch of people may not be able to see this day, or rational use of the earth’s water resources Is the key.
What happened to groundwater in China?
China also released the annual change of groundwater in 2021. According to data, the total annual storage of groundwater in China’s main plains and basins will increase by 1.09 billion cubic meters in 2020, of which the annual increase in shallow groundwater storage will be 2.84 billion cubic meters, and deep groundwater The annual storage volume is reduced by 1.75 billion cubic meters. The annual overall increase in groundwater storage in 11 plains and basins including Sanjiang Plain and Sichuan Basin.
The storage of groundwater in the North China Plain and the Huanghuai Plain is still in deficit. Therefore, in general, there is still a risk of water shortage in the North China and Huanghuai Plains. After all, the water storage is still in a state of loss.
Therefore, it can be seen from this data that there are still some areas where groundwater is relatively scarce in China. This also reminds once again that the rational use of water resources is the most important issue today.
Summary
Water resources are now in a state of “scarce” on the earth. In fact, scientists do not conduct research and we all know that after the emergence of a large number of groundwater extraction, mankind is already facing a water crisis. At the same time, coupled with the influence of climate, the naturally formed “groundwater” is also much less. Therefore, when drought occurs in many areas nowadays, the water is not available for food. If groundwater has been reasonably developed, even if it is caused by climate In the drought, we still have groundwater supply, and there will be no rain at all.
This is the problem. The earth is “drying out”, and the role that humans play in it is indispensable. In fact, it is the climate. However, the water resources that humans can really use only account for 0.26% of the earth’s total water. However, today there are about 1 billion in the world. Many people lack water. According to expert estimates, the world’s water shortage population will exceed 2.5 billion by 2025, so this is a dangerous signal.
