Why does the weather on the earth change so much now?

There are many reasons for global warming, which can be summarized as follows:

1. Population explosion factor

The rapid population growth in recent years is one of the main factors leading to global warming. At the same time, it also seriously destroys the balance between natural ecological environment. With such a huge population, the annual carbon dioxide emitted by itself will be an amazing number, and the result will directly lead to the continuous increase of carbon dioxide content in the atmosphere, thus directly affecting the climate change on the earth's surface.

2. Atmospheric environmental pollution factors

At present, the increasingly serious environmental pollution has become a major global problem, and it is also one of the main factors leading to global warming. Now, the research on global climate change has clearly pointed out that the temperature of the earth's surface has started to rise since the end of last century.

3. Deteriorating factors of marine ecological environment

At present, the change of sea level is on the rise. According to the prediction of relevant experts, the sea level may rise by 50 cm by the middle of the next century. If no measures are taken, it will directly lead to the destruction and pollution of fresh water resources and other adverse consequences. In addition, a large number of toxic chemical wastes and solid wastes produced by land activities are continuously discharged into the sea; Major oil spills in seawater and the destruction of coastal ecological environment by human activities are the main factors leading to the destruction of seawater ecological environment.

4. Land erosion, desertification and other destructive factors

5. Factors of sharp decline of forest resources

Worldwide, due to natural or man-made factors, the forest area is decreasing sharply.

6. Hazard factors of acid rain

The influence of acid rain on ecological environment has attracted more and more attention all over the world. Acid rain will destroy forests, acidify lakes and endanger living things. At present, most of the acid rain in the world is concentrated in Europe and North America, and most of them occur in developed countries and some developing countries. Acid rain is also occurring and developing rapidly.

7. Factors accelerating species extinction

Life on the earth is a precious resource for human beings, and the diversity of life is the basis for human survival and development. But at present, the biological species on the earth are disappearing at an unprecedented rate.

8. Water pollution factors

According to the water quality monitoring project of Global Environmental Monitoring System, about 65,438+00% of the monitored rivers in the world are polluted. Since the beginning of this century, the water consumption of human beings is increasing rapidly, and the scale of water pollution is also expanding, forming a contradiction between supply and demand of fresh water. Therefore, the treatment of water pollution will be very urgent and important.

9. Toxic waste pollution factors

More and more toxic chemicals not only pose a serious threat to human survival, but also do harm to the ecological environment on the earth's surface. The consequences of global warming

According to Xinhua News Agency, researchers at the Worldwatch Institute in the United States recently warned that global warming will lead to a reduction in global agricultural production, and food shortages may occur in the next century. The researchers came to this view after analyzing the information released by the United Nations and the National Academy of Sciences and the trend of the world rice market.

According to world observation research, global warming and the decline of groundwater level will become the direct cause of global food supply shortage, which is reflected in the rising trend of global rice prices.

Global warming will also lead to sea level rise, and coastal areas will be flooded, and Daxi Island will be flooded in this way.

According to statistics released by the US government, the price of rice has increased by 30%, reaching $260 per ton, although the global grain harvest last year and the prices of wheat and corn fell.

A research report published by the National Academy of Sciences last year showed that the abnormal temperature rise in the rice growing season would reduce the harvest. In addition, the decline of groundwater level and the depletion of wells in many parts of the world will also affect food production.