Why are natural disasters terrible, and why are they getting worse now?

Because all kinds of events that harm animals and plants are generally called disasters. Throughout human history, it can be seen that there are two main causes of disasters: one is natural variation, and the other is human influence.

Therefore, disasters with natural variation as the main cause are usually called natural disasters, such as **, storms, and tsunamis; Disasters caused by man-made influences are called man-made disasters, such as human-caused fires, traffic accidents, and acid rain. The process of natural disasters can be long and short, slow and urgent. Some natural disasters, when the change of disaster-causing factors exceeds a certain intensity, will manifest as disaster behavior in a few days, hours or even minutes and seconds, such as volcanic eruptions, floods, hurricanes, storm surges, hail, etc., such disasters are called sudden natural disasters.

Although droughts, crop and forest diseases, insects, and weeds generally take a few months to become disasters, the formation and end of disasters are still relatively rapid and obvious, so they are also classified as sudden natural disasters. In addition, there are some natural disasters that gradually appear to become disasters under the condition of long-term development of disaster-causing factors, such as land desertification, soil erosion, environmental degradation, etc., which usually take several years or more to develop, which is called slow-onset natural disasters. Many natural disasters, especially those of high grade and intensity, often lead to a series of other disasters occurring one after another, a phenomenon called disaster chain.

The earliest occurring disaster in the disaster chain is called a primary disaster; Disasters induced by primary disasters are called secondary disasters. After the occurrence of natural disasters, the harmonious conditions for human existence are disrupted, and a series of other disasters can be born, which are generally called derivative disasters. For example, after a major drought, the extreme shortage of surface and shallow fresh water forces people to drink groundwater with high fluoride content in the deep layers, which leads to fluorosis, which is called a derivative disaster.

Of course, the process of disasters is often complex, and sometimes a disaster can be caused by several disasters, or a single disaster cause can cause several different disasters at the same time. In this case, the determination of the type of disaster should be based on the leading cause of the disaster and its main manifestations.

It's not scary, as long as it's defended properly.

As natural disasters are becoming more and more severe due to global warming, the following methods can be used to reduce natural disasters.

A rapid attribution analysis of global climate change conducted by a panel of top international climatologists shows that global warming is a major factor in the frequency of extreme weather events, WMO said.

If we compare the Earth to a heat-generating furnace, greenhouse gases in the atmosphere, such as carbon dioxide, absorb heat from land and sea, thus disrupting the Earth's thermal cycle and ultimately leading to an increase in global temperatures.

Zhu Dingzhen, chief meteorological service expert at the Public Meteorological Service Center of the China Meteorological Administration, said that although the earth has experienced many significant warming and cooling in the past four billion years, scientists are most concerned about the overdevelopment of human beings and will bring disaster to life on earth.

In particular, severe heat waves can lead to crop failures, personnel**, and widespread power outages due to increased use of air conditioning.

1. Prevention first, always be prepared.

Strengthen education on the prevention of natural disasters and accidents, and enhance the people's awareness of prevention. Strengthen daily inspections, discover potential dangers in a timely manner, and take effective prevention and control measures in a timely manner to minimize losses caused by disasters.

Conduct regular self-inspections of construction sites, fences, ditches, power lines, trees and other buildings to detect problems early and eliminate them in time.

2. Manage according to law and lead in a unified manner.

Strictly abide by relevant national laws and regulations, handle emergency prevention, reporting and control and medical assistance in accordance with the law, and hold accountable those who violate regulations. The Leading Group for Emergency Handling of Natural Disasters is responsible for prevention, command, coordination and handling.

3. Quick response and efficient operation.

Establish a rapid early warning and response mechanism, strengthen the reserve of human, material and financial resources, strengthen the emergency response to emergencies, and respond quickly in the event of a natural disaster, and do a good job of disposal in a timely and efficient manner.

Top 10 terrible natural disasters: avalanches, landslides, droughts, floods, fires, volcanic eruptions, tsunamis, tornadoes, typhoons, etc.

1. Avalanche, the reaper of life for snow-capped mountain climbers.

2. Landslides, the residents under the mountain will be buried instantly, and there is basically no possibility of survival.

3. Drought, severe drought will make animals and plants extinct.

4. Floods and floods are also terrible anomalies.

5. Fires, fires raged, and there were heavy losses every time.

6. Volcanic eruptions, nature's wrath makes people flee from the wind.

7. Tsunami, how many people can survive the apocalypse.

8. **, big or small** happens every year around the world. The tragic situation of Wenchuan is still vivid.

9. Tornadoes, there are not many tornadoes in my country, but tornadoes often appear in Europe and the United States, which is quite scary.

10. Typhoons are often encountered in China's coastal areas, and they suffer heavy losses every time.

Nature has natural disasters and natural disasters are: landslides, forest fires, tsunamis, avalanches, droughts, floods, volcanic eruptions, tornadoes, typhoons, etc.

1. Landslide refers to the effect and phenomenon that a certain part of the rock and soil on the mountain slope moves to the bottom of the slope as a whole under the action of gravity (including the gravity of the rock and soil itself and the dynamic and static pressure of groundwater) along a certain weak structural plane (zone). It is commonly known as "walking the mountain", "breaking the mountain", "slippery ground", "slippery" and so on. It is one of the common geological hazards.

2. Forest fire refers to the forest fire behavior that is out of human control, spreads and expands freely in the forest land, and brings certain harm and loss to the forest, forest ecosystem and human beings. Forest fire is a natural disaster that is sudden, destructive, and difficult to deal with.

3. Tsunamis are destructive waves generated by submarine **, volcanic eruptions, submarine landslides or meteorological changes, with a wave speed of up to 700 800 kilometers per hour, which can cross the ocean in a few hours; The wavelength can reach hundreds of kilometers and can travel thousands of kilometers with little energy loss. In the vast ocean, the wave height is less than one meter, but when it reaches the shallow water of the coast, the wavelength decreases and the wave height increases sharply, reaching tens of meters, forming a "wall of water" containing huge energy.

4. Volcanic eruption is a peculiar geological phenomenon, a manifestation of crustal movement, and the most intense display of thermal energy on the surface of the earth. It is the release of ejecta such as magma from the crater to the surface in a short period of time.

Due to the large amount of volatiles contained in the magma, coupled with the confining pressure of the overlying rock layer, these volatiles are dissolved in the magma and cannot overflow, when the magma rises close to the surface, the pressure decreases, and the volatiles are released sharply, thus forming a volcanic eruption.

5. Typhoons are a type of tropical cyclone. A tropical cyclone is a low-pressure vortex that occurs over the tropical or subtropical oceans and is a powerful and deep "tropical weather system". Tropical cyclones in the South China Sea and the Northwest Pacific are classified into six categories according to their maximum average wind strength (wind speed) near the center of the bottom layer, of which those with winds of 12 or more are collectively referred to as typhoons.

6. **, also known as ground motion and ground vibration, is a natural phenomenon caused by the rapid release of energy from the earth's crust, during which ** waves will be generated. The squeezing and collision between plates on the earth causes dislocation and rupture on the edge of the plate and the interior of the plate, which is the main reason for the conflict.

**The place where it begins to occur is called the hypocenter, and the ground directly above the epicenter is called the epicenter. The most destructive ground vibration is called the extreme earthquake area, which is often the area where the epicenter is located, which often causes serious personnel, and can lead to disasters, floods, toxic gas leaks, the spread of bacteria and radioactive materials, and may also cause secondary disasters such as tsunamis, landslides, collapses, and ground fissures.

Natural disasters refer to natural phenomena that bring danger to human survival or damage to the human living environment, including drought, high temperature, low temperature, cold wave, flood, waterlogging, mountain flood, typhoon, tornado, flame tornado, hail, hail, frost, heavy rain, heavy snow, freezing rain, fog, strong wind, icing, haze, haze, floating dust, blowing sand, sandstorm, thunderstorm, thunderstorm, ball lightning and other meteorological disasters.

Natural variations on the earth include natural variations induced by human activities, and natural disasters are conceived in the earth's surface environment composed of the atmosphere, lithosphere, hydrosphere, and biosphere. It happens all the time, and when this kind of mutation brings harm to human society, it constitutes a natural disaster. The natural disaster system is a system of variation in the earth's surface layer composed of the disaster-producing environment, disaster-causing factors and disaster-bearing bodies, and the disaster situation is the result of the interaction of various subsystems in the system.