Information about destroying the earth

In some countries, capitalists or economic agents of production units arbitrarily discharge all kinds of harmful substances into nature in pursuit of high profits, seriously polluting the environment, especially air and water, causing social harm, causing many diseases and seriously threatening the health and life of the broad masses of people. There are many kinds of water pollution, among which Minamata disease is one of the world-famous public hazards in Japan. Minamata disease first occurred in Minamata Town, Kumamoto Prefecture, Kyushu, Japan in 1953. At that time, it was called Minamata disease because the cause was unknown.

1950, in the fishing village near Minamata Bay, some cats were found to have unsteady gait, cramped and paralyzed, and finally jumped into the water and drowned. Locals call them "suicide cats". 1953, a strange disease was found in Minamata town. At first, he just had slurred speech, unsteady gait, facial dementia, deafness, blindness and numbness. Finally, he lost his nerve, fell asleep for a while, became excited for a while, bent down and screamed and died. At 1956, more than 50 people with the same symptoms were found in this area. After investigation and study of the disease, it was not until 1962 that Minamata disease was determined to be caused by environmental pollution of mercury, especially chronic methylmercury poisoning caused by eating contaminated fish and shellfish. This is caused by methylmercuric chloride discharged from the factory in Minamata town, which pollutes the sea area and poisons fish and shellfish. 1963 after minamata town, a large number of suicide cats and dogs appeared in Niigata prefecture, Japan. 1973, Minamata disease occurred again in Youming Town and other places along the southern coast of Youming Sea. It is reported that the number of these three cases is above 900. In fact, the number of victims in Japan far exceeds this figure, and there are about 1 10,000 victims in Minamata alone.

Mercury, commonly called mercury, is widely used in many industrial sectors. Mercury and its compounds are harmful substances, especially the alkyl compounds of mercury are more toxic. Mercury and its compounds can enter the human body through the respiratory system or digestive system. After inorganic mercury enters human body, the highest mercury concentration is in kidney and liver. The accumulation of organic mercury in human brain is the most significant, followed by liver and kidney. The clinical symptoms after mercury poisoning are very similar to Minamata disease.

In addition to mercury, there are phenols, cyanogens, chromium, arsenic and some heavy metal salts that cause water pollution. These substances are discharged from factories and scientific research units, causing serious water pollution. As a result, harm to human beings has occurred from time to time at home and abroad. Therefore, in the process of developing the national economy and accelerating the four modernizations, we must pay attention to protecting the environment on which human beings depend, preventing pollution, and enabling human beings to survive and develop in a beautiful and comfortable environment.

Black storm: A kind of sandstorm. The dust raised by strong wind forms a sand wall, and the visibility is almost zero.

Since18th century, a large number of immigrants came to the western plains of the United States, which led to three black storms in 1930s. 1A storm in May, 934, which lasted for three days and nights, blew from the west coast to the east coast, forming a gray-yellow dust belt with a length of 2,400 kilometers from east to west, a width of 2,400 kilometers from north to south and a height of 3,400 kilometers. The storm moved eastward at a speed of more than 100 km per hour, sweeping across the North American continent, sandstorms and dark days. In Kazakhstan in Central Asia, a large number of wasteland was reclaimed in 1950s, resulting in a large area of soil. Wind erosion, similar to the dust storm in the 1930s in the United States, has also occurred. In the desert of1160,000 square kilometers in the north of China, 39% is desertification caused by sandstorms caused by human factors.

Sandstorm is a sudden and high-intensity sandstorm disaster. The direct economic loss caused by this in China is as high as 4.5 billion yuan every year. Northwest China, including Xinjiang, Gansu, Qinghai and Ningxia, as well as central and western Shaanxi and Inner Mongolia, are sandstorm-prone areas in China. 1On May 5, 1993, a severe sandstorm caused huge losses in parts of Gansu, Ningxia and Inner Mongolia, with 85 people killed, 264 disabled and 3/kloc-0 missing, resulting in a direct economic loss of 725 million yuan. Seriously affect the economic development of these areas.