Information about human pollution of the earth

Rivers dry up, forests decrease, animal extinction, ozone layer destruction, greenhouse effect and so on.

Greenhouse effect, acid rain and ozone layer destruction are the environmental impacts caused by air pollution. This kind of environmental effect from environmental pollution is lagging behind, and it is often difficult to be detected or predicted when pollution occurs. However, once it happens, it means that environmental pollution has developed to a very serious degree. Of course, the most direct and easily felt consequence of environmental pollution is to reduce the environmental quality of human beings and affect their quality of life, physical health and production activities. For example, urban air pollution causes air pollution, and the incidence of people is rising. Water pollution worsens the quality of water environment, and the quality of drinking water sources generally declines, threatening people's health and causing premature birth or malformation of fetus. serious

Pollution incidents not only bring health problems, but also cause social problems. With the intensification of pollution and the improvement of people's awareness of environmental protection, disputes and conflicts between people caused by pollution have increased year by year.

At present, environmental pollution problems have appeared in different degrees all over the world, including atmospheric environmental pollution, marine pollution and urban environmental problems. With the globalization of economy and trade, environmental pollution is becoming more and more international, and the transboundary movement of hazardous wastes has also appeared in recent years.

It is the outstanding performance in this respect.

The adverse effects of the destruction of the earth on human beings are as follows: the ecological environment situation is very severe. First, soil erosion is serious, land desertification is accelerating, forest ecological function is declining, grassland resources are degraded, and water ecological environment system is still deteriorating; Second, the water environment in agriculture and rural areas is seriously polluted, and food safety issues are increasingly prominent; Third, the invasion of harmful alien species, the sharp decline of biodiversity, the loss of genetic resources and the destruction of biological resources are not optimistic; Fourth, due to China's huge population and high natural population growth rate, the per capita possession of important resources related to the national economy and people's livelihood has been declining, and the resource crisis has emerged; Fifth, the ecological function continues to decline, ecological security is threatened, the output of industrial solid waste increases sharply, the total amount of air pollution is still at a high level, global warming, ozone layer destruction and so on. The present situation of ecological environment not only brings great destructive power to the ecological environment, but also restricts the coordinated development of economy and society and slows down the socialist process. First of all, the great destruction of the ecological environment has caused us great economic losses. Take the annual flood disaster in China as an example. After a disaster, thousands of people left us forever, a large number of people were homeless, countless beautiful homes were destroyed, countless fertile fields were flooded, and traffic was interrupted by road damage. Let's carefully estimate whether we have suffered huge economic losses. Secondly, the arbitrary discharge of waste water, waste gas, waste residue and other wastes leads to the pollution of the atmosphere, rivers and land, the serious destruction of the ecological environment, and also seriously damages the physical and mental health of the broad masses of people; Thirdly, due to the serious destruction of vegetation, serious soil erosion and increasingly serious land desertification, many farmers have been forced to leave their homes, and most of them have no fixed place to live, which has aggravated social instability. In fact, there are still many bad consequences caused by destroying the environment.

② Causes of environmental pollution

Generally speaking, environmental pollution can be the result of human activities and natural activities, or the result of the interaction of these two activities. For example, volcanic eruption releases a lot of harmful gases such as dust and sulfur dioxide into the atmosphere, which also pollutes the atmospheric environment. But usually, environmental pollution is more caused by human activities, especially social and economic activities. What we usually refer to is the environmental pollution caused by such human activities. The reason why human activities cause environmental pollution is because

Because there is a fundamental difference between human beings and other creatures: in addition to their own production, human beings also carry out larger-scale mass production, which all other creatures do not have. Because of this, the intensity of human activities is far greater than that of other creatures. For example, in the use of water in the ecosystem, other organisms only use the amount that meets their survival requirements, and humans don't know how many times more water is used than other organisms, so that some local ecosystems are not enough. The emission source of pollutants is called pollution.

Source. The situation of various pollution sources will be described in the fourth section.

Environmental pollution can be classified from different angles. According to the type of environmental pollution system or its leading elements, it can be divided into air pollution, water pollution, soil pollution and so on. According to the social field where pollution sources are located, they can be divided into industrial pollution, agricultural pollution and traffic pollution. According to the form or nature of pollutants, they can be divided into waste gas pollution, waste water pollution, solid waste pollution and noise pollution.

Dyeing, radiation pollution, etc

According to the description of the astronauts who were lucky enough to fly into space, the earth they saw in space was a beautiful, crystal-clear and only living planet, surrounded by a thin layer of water-blue tulle. The earth has always made selfless contributions to human beings, but because human beings don't know how to cherish, develop unrestrained and destroy at will, not only the natural resources of the earth are getting less and less, but also a series of ecological disasters have caused a threat to human survival. For example, in July 1995, an incident occurred in our country: several factories discharged excessive sewage and smoke into the ocean and atmosphere, which led to a large amount of acid rain decline and destroyed a large area of forests and crops. This not only pollutes the environment, but also causes serious losses to natural resources.

Our earth is both lovely and fragile. Students, scientists have already proved that there is no second planet suitable for human habitation within 40 trillion kilometers of the universe centered on the earth. Humans can't expect to move to other planets after destroying the earth.

There is only one earth, citizens of the earth, wake up! Let's start with protecting every grass, tree, mountain and water around us and take action. Let's protect the earth, our home!

This lesson introduces the knowledge about the earth from the perspective of human existence, and expounds the truth that there is only one earth for human existence. The significance of protecting the ecological environment of ball games is expounded. The text shows that the earth is facing the threat of resource depletion from the aspects of the smallness of the earth in the universe, the narrow range of human activities, and the random exploitation or destruction of the limited natural resources owned by the earth. Then, the results of scientific research prove that when the earth's resources are exhausted, there will be no second planet for human habitation. Finally, it is concluded that there is only one choice for human beings, and that is to protect the earth and its ecological environment carefully.

1, Mas Valley Smoke Event 1930

Mas Valley Industrial Zone, Belgium. There are many factories in this narrow valley, such as oil refinery, metal factory and glass factory. From February to 5th, 65438+/kloc-0, a strong inversion layer appeared over the valley, which prevented the smoke and dust emitted by the 1 3 chimney from spreading, and a large number of harmful gases accumulated in the near-earth atmosphere, causing serious harm to human body. More than 60 people died in a week, among which the death rate of patients with heart disease and lung disease was the highest, and many livestock died. This is the earliest recorded public hazard event in this century.

2. Los Angeles photochemical smog incident 1943

In summer, Los Angeles on the west coast of the United States. 2.5 million cars in this city burn 1 100 tons of gasoline every day. The hydrocarbons produced by gasoline combustion react chemically under the irradiation of ultraviolet rays from the sun, forming light blue smoke, which makes most citizens in the city envious and have a headache. Later, people called this pollution photochemical smog. There were two photochemical smog incidents in Los Angeles at 1955 and 1970. In the former, more than 400 people died of five senses poisoning and respiratory failure, while in the latter, three quarters of the people in the city were sick.

3. Donola Smoke Incident 1948

There are many large ironmaking plants, zinc smelting plants and sulfuric acid plants in Donola, Pennsylvania, USA. 1948101In the early morning of October 26th, the air was filled with fog, which was controlled by anticyclone and inversion temperature, so the harmful gas emitted by the factory could not spread out. Among 0/4000 people in the city/KLOC-6,000 people have symptoms such as eye pain, sore throat, headache, chest tightness, vomiting and diarrhea. 17 people died.

4. London Fog and Haze Event 1952

Since 1952, there have been 12 major smog events in London, and the main culprits are dust and sulfur dioxide emitted from coal combustion. Smoke forced all planes to stop flying, cars turned on lights during the day, pedestrians had difficulty walking, and the number of patients with respiratory diseases increased sharply. 1952 65438+ During that period in February, more than 4,000 people died in five days and more than 8,000 people died in two months.

5. Minamata disease incident 1953 1956.

The wastewater discharged by a nitrogenous fertilizer company in Minamata Town, Kumamoto Prefecture, Japan contains mercury, which is converted into methylmercury by some organisms after being discharged into the bay. These mercury are concentrated in seawater, sediments and fish, and they are poisoned through the food chain. At that time, the most sick cat was the one who loved fish. The poisoned cat went crazy and twitched and committed suicide by jumping into the sea. In a few years, even cats disappeared in Minamata. 1956 patients with symptoms similar to those of cats appeared. Because the reason was not clear at first, it was named after the local place name. 199 1 year, there are still 2248 poisoned patients announced by the Japanese Environment Agency, of which 1004 died.

6. Bone pain incident 1955 1972

Cadmium is an element that the human body does not need. Some lead-zinc mines in Toyama Prefecture, Japan discharge wastewater during mining and smelting, and the wastewater accumulates heavy metal "cadmium" in rivers. People who drink such river water for a long time and eat rice irrigated with cadmium-containing river water will suffer from severe bone deformation, severe pain, shortened body length and brittle bones.

7. Japan rice bran oil incident 1968.

First, hundreds of thousands of chickens died after eating poisonous feed. People didn't delve into the source of the poison, and then 13000 people in Kitakyushu suffered. These chickens and people got sick from eating rice bran oil containing PCBs. The patient began to have eyelid edema, sweaty palms and red papules all over his body. Then liver function drops, muscles ache and cough. This incident once put the whole western Japan into a panic.

8. Bhopal Incident in India 1984

On February 3rd, 65438, pesticide plant, Bhopal, India, the toxic methyl isocyanate in the underground storage tank exploded and leaked due to the pressure rise due to the mismanagement and improper operation of the United Carbonization Company. 45 tons of toxic gas formed thick smoke and attacked the urban area of Bhopal at a speed of 5000 meters per hour. Nearly 20,000 people died, more than 200,000 people were injured, 50,000 people were blind, pregnant women aborted or gave birth to dead babies, the affected area was 40 square kilometers, and thousands of livestock were poisoned.

9. Chernobyl nuclear accident 1986

On April 26th, the Chernobyl nuclear power plant in the suburb of Kiev, Ukraine caught fire in the explosion of No.4 reactor due to mismanagement and operational errors, resulting in a large amount of radioactive materials leaking. Radioactive materials leaked from nuclear power plants have been detected in western European countries and most parts of the world. 3 1 person died and 237 people were seriously injured by radiation. Moreover, within 20 years, there may be 30 thousand people suffering from cancer. Primary and secondary school students in Kiev and Kiev all evacuated to the seaside, all crops around the nuclear power plant were buried, 20 million tons of grain was lost, and all trees within 7 kilometers of the power station died. In the next half century, farming and grazing can't be carried out within 10 km, and milk can't be produced within 100 km ... This nuclear pollution and flying dust have also brought serious disasters to neighboring countries. This is the most serious nuclear pollution in the world.

10. The Rhine River is polluted by highly toxic substances 1986.

1 65438+1October1day, the warehouse of Sandoz chemical plant in Basel, Switzerland caught fire, and nearly 30 tons of highly toxic sulfides, phosphides and mercury-containing chemical products flowed into the Rhine with fire extinguishing agent and water. In the downstream 150km range, more than 600,000 fish were poisoned, and the well water on both sides of the river bank was not drinkable within 500km. The waterworks along the river bank closed and the brewery stopped production. Poisons deposited at the bottom of the river will make the Rhine "extinct" for 20 years.