Mas Valley Incident

1 930 65438+February/kloc-0-5, harmful gases emitted by coking plants, steel mills, sulfuric acid plants, fertilizer plants and other factories in Belgium accumulated in large quantities under the condition of inversion, causing more than 60 poisoning deaths, thousands of people suffering from respiratory diseases and many poultry deaths.

Donola incident

1948 101Oct. 26th to1Oct. 26th, 3 1, the town of Donola, south of Pittsburgh, Pennsylvania, USA, is located in a valley with many factories. The atmosphere is controlled by anticyclones and inversion temperatures, and it is foggy continuously. Air pollutants accumulated in the surface layer, making 59 1 1 person sick and 400 people dead within 4 days.

Los Angeles photochemical pollution incident

In the early 1950s, a serious photochemical pollution incident occurred in Los Angeles, USA. The city is surrounded by mountains on three sides and expressway criss-crosses. Due to automobile oil leakage, incomplete combustion of gasoline and automobile exhaust, nearly a thousand tons of oil waste gas, nitrogen oxides and carbon monoxide have accumulated over the city. These substances form light blue photochemical smog under the irradiation of sunlight. Photochemical smog can irritate people's eyes, nose and throat, leading to eye diseases, laryngitis and headaches. In a smog incident on June 5438+0952+February 65438, 400 people over 65 died.

London smog

1952 65438+February 5-8, London, England May-8, almost the whole of Britain was shrouded in dense fog, and the number of deaths in four days was about 40,000 more than that in the same period of normal years, among which the number of deaths over 45 years old was the most, about three times as high as usual; /kloc-died at the age of 0, about twice as many as usual. The number of people who died of bronchitis in the week before the incident was 9.3 times that of the week before the incident.

Asthma occurred in the city on the 4th.

196 1 occurred in Niigata, Japan. The waste gas produced by oil smelting and various fuels in this city makes the whole city full of yellow smoke all year round. The annual emission of dust and carbon dioxide from factories in this city is as high as 6.5438+0.3 million tons. Sulfuric acid smoke formed by heavy metal particles and sulfur dioxide in the air is inhaled into the lungs, which makes people suffer from respiratory diseases such as tracheitis, bronchial asthma and emphysema, collectively known as four-day asthma.

Minamata disease incident

1956 occurred in Minamata Town, Kumamoto Prefecture, Japan. The mercury-containing industrial wastewater in this city polluted the water body, which led to fish poisoning in Minamata Bay, and people would be poisoned if they ate fish. From 65438 to 0956, there began to appear some patients with numbness of hands and feet, hearing failure, dyskinesia and, in severe cases, madness in Minamata town.

A painful event

From 1955 to 1972, in Shentongchuan Valley, Toyama Prefecture, Japan, the cadmium content in the soil increased obviously because the cadmium-containing wastewater discharged from smelters polluted the river water, and the residents on both sides of the river irrigated the farmland with the river water. Residents were poisoned by eating rice with high cadmium content and drinking river water with high cadmium content, resulting in kidney and stomach damage. Because patients often cry because of pain, the Japanese call this disease "er-er-er-er-er" disease, that is, "pain disease".

Kang you Shi Jian

From March, 65438 to March, 0968, polychlorinated biphenyls (PCBs) were used as heat carriers in the deodorization process when rice bran oil was produced in Kitakyushu and Aichi, Japan. Due to poor management, PCBs were mixed into rice bran oil. With the sale of this toxic rice bran oil in various places, a large number of people were poisoned. At first, the patient only had swollen eyelids, sweaty palms and red papules all over his body. Then his muscles ached and he coughed all over. In severe cases, I feel nausea and vomiting, and my liver function declines. Some of them died because of ineffective treatment. The disease is fierce, and the number of patients soon reaches 13000. Feeding poultry with the black oil in this rice bran oil caused hundreds of thousands of chickens to die.