Why does the earth's weather now change so much from the weather in the past?
There are many reasons for global warming, which can be summarized as follows:
1. Factors of rapid population increase
The rapid increase in population in recent years is one of the main causes of global warming. One of the main factors of warming. At the same time, this also seriously threatens the balance of the natural ecological environment. Such a large population will emit a staggering amount of carbon dioxide every year. The result will be a direct increase in the content of carbon dioxide in the atmosphere. The carbon dioxide "greenhouse effect" formed in this way will directly affect the climate on the earth's surface. change.
2. Factors of atmospheric environmental pollution
At present, the increasingly serious environmental pollution has constituted a major global problem and is also one of the main factors leading to global warming. Now, research on global climate change has clearly shown that Earth's surface temperatures have been rising since the end of the last century.
3. Factors deteriorating the marine ecological environment
At present, sea level changes are showing a continuous upward trend. According to the predictions of relevant experts, sea levels may rise by the middle of the next century. 50cm. If appropriate measures are not taken, it will directly lead to the destruction and pollution of fresh water resources and other adverse consequences. In addition, a large amount of toxic chemical waste and solid waste generated by land-based activities are continuously discharged into the ocean; major oil spills (leakage) incidents in seawater, as well as damage to the ecological environment in coastal areas caused by human activities, etc. It is the main factor leading to the destruction of the seawater ecological environment.
4. Destructive factors such as land erosion and desertification
5. Factors of sharp decline in forest resources
Around the world, due to natural or man-made factors As a result, the forest area is shrinking significantly.
6. Hazardous factors of acid rain
The impact of acid rain on the ecological environment has attracted more and more attention around the world. Acid rain can destroy forests, acidify lakes, and endanger organisms. At present, acid rain in the world is mostly concentrated in Europe and North America. Most acid rain occurs in developed countries. In some developing countries, acid rain is also occurring and developing rapidly.
7. Factors accelerating species extinction
The living things on the earth are a valuable resource for mankind, and biological diversity is the basis for human survival and development. But biological species on earth are currently disappearing at an unprecedented rate.
8. Water pollution factors
According to the water quality monitoring project of the Global Environmental Monitoring System, about 10% of monitored river water in the world is polluted. Since this century, human water consumption has been increasing rapidly. The land is increasing, and the scale of water pollution is also expanding, which creates a contradiction between the supply and demand of fresh water. It can be seen that the treatment of water pollution will be very urgent and important.
9. Toxic waste pollution factors
The growing number of toxic chemicals not only poses a serious threat to human survival, but will also cause harm to the ecological environment on the earth's surface. Consequences of global warming
According to Xinhua News Agency, researchers from the Worldwatch Institute in the United States recently warned that global climate warming will lead to a reduction in global agricultural production and may lead to food shortages in the next century. The researchers came to this view after analyzing information released by the United Nations and the National Academy of Sciences, as well as world rice market trends.
World Watch research believes that global climate warming and declining groundwater levels will become direct causes of global food supply shortages, and the rising trend in global rice prices reflects this.
Global warming will also cause sea levels to rise, and coastal areas will be submerged. This is how Atlantis was submerged in the past.
Statistics released by the U.S. government show that even with a bumper global grain harvest and falling wheat and corn prices last year, rice prices still rose by 30%, reaching $260 per ton.
A research report published by the National Academy of Sciences last year showed that abnormally rising temperatures during the rice growing season will reduce harvests. In addition, groundwater levels are declining and water wells are drying up in many areas around the world, which will also have an impact on food production.