Talk about the consequences of natural disasters.

The consequences of natural disasters include the destruction of drinking water supply system, food shortage, environmental pollution, economic losses and harm to human and animal lives.

1. The drinking water supply system was damaged.

Most natural disasters may cause the destruction of drinking water supply system, which will be the first problem after the disaster, and often lead to the outbreak and epidemic of large-scale intestinal infectious diseases in the early stage after the disaster.

2. Food shortage

A large-scale locust plague, plant diseases and insect pests or crop diseases may lead to millions of hectares of crop production reduction or even crop failure, and hundreds of thousands of people will die.

The output of agricultural and forestry crops destroyed by plagues, pests and weeds in the world accounts for about 1/3. Due to the spread of plague caused by animals and microorganisms, thousands of people die every year, and the loss of animal husbandry is also very heavy. Diseases, insects and rats are also very harmful, destroying crops, pastures and jungles, destroying vegetation and destroying the foundation on which human beings depend for survival.

3. Environmental pollution

In the atmosphere, carbon dioxide is always accumulating, which greatly enhances the "greenhouse effect" of the earth, thus melting glaciers and rising sea levels. In the long run, a large area of coastal lowlands will eventually become Wang Yang.

The increase of freon emissions has seriously damaged the atmospheric ozone layer, resulting in excessive ultraviolet radiation on the earth, which will not only endanger human health, but also have a far-reaching impact on the normal development of animals and plants.

4. Economic losses

The direct or indirect losses caused by meteorological and hydrological disasters in the world every year are about 30 billion dollars, and the death toll reaches more than 65.438+500 million, accounting for 80% of all natural disasters. Among all the industrial losses caused by natural disasters, floods account for about 40%, wind disasters account for about 20%, and droughts account for about 15%.

Areas where droughts and floods are intertwined and floods occur frequently are also areas with high incidence of drought. Drought does not mean that people will die soon, but mainly means that crops can be reduced and crops can't be harvested, so thousands of people will starve to death or die of plague and unrest.

5. Harm to human and animal life

Among natural disasters, earthquake is a kind of natural disaster with the largest energy release and the most severe instantaneous damage. There are more than 5 million earthquakes on the earth every year, and the number of earthquakes that may cause damage is about 1000, including about 20 earthquakes of magnitude 7 or above.

In the 20th century, the frequency of debris flow was also very high, which often caused serious damage to the jungle and vegetation in mountainous areas. According to the flood statistics of various countries, among the total flood deaths, the death toll caused by debris flow accounts for 1/3 ~ 1/2.

Landslides and collapses are most likely to occur in faults, slopes with damaged vegetation and poorly planned engineering sites, and generally there will be secondary disasters such as floods and earthquakes. Land subsidence often occurs in cities and coastal areas. The main reason is to extract groundwater, which makes the groundwater level drop and the ground drop.