CATDOLL : CATDOLL: The impact of environmental pollution on humans

The impact of environmental pollution on humans

1. The harm of air pollution to human body

The air mainly contains nitrogen and oxygen, of which oxygen is the most needed by humans, animals and plants, accounting for about 21% of the air; if the oxygen content in the air drops to 16%, a burning candle will go out; if it drops to 7%, humans and animals will soon be suffocated. The air also contains gases and substances such as water vapor, carbon dioxide, sulfur oxides, nitrogen oxides, and dust. If the content of harmful gases and dust such as sulfur oxides, nitrogen oxides, and dust in the air is too high, the air is polluted. The more these harmful gases and dirt are mixed in the air, the more polluted the air is, and the greater the harm to humans, animals and plants. Air pollution first endangers people's health, secondly affects the growth of animals and plants, and also causes global climate change.

Air pollution causes respiratory diseases and increases mortality. The lung cancer mortality rate in heavily polluted areas of Chongqing has been rising year by year, exceeding 50 people per 100,000, 4.7 times higher than in relatively clean areas. The lung cancer mortality rate in some neighborhoods of Changsha is as high as 94.36 people per 100,000.

2. The harm of enhanced greenhouse effect and global warming to human body

In recent decades, due to the impact of human activities, especially the sharp increase in energy consumption and the destruction of forests, the content of carbon dioxide in the air has continued to increase, which has led to the continuous strengthening of the greenhouse effect and global warming. This will increase the incidence of respiratory diseases, cancer, headaches, etc., and promote the occurrence and spread of tropical epidemic diseases such as malaria.

3. Impact of acid rain on human production and life

Acid rain is called the death god in the sky. It can acidify the soil and lakes, causing forests to decline and wither, and many aquatic organisms to be unable to survive. This in turn affects human production and life. In addition, acid rain also has an erosive effect on cultural relics and buildings.

4. The impact of water pollution.

The consequences of water pollution are serious. Not only has it caused great losses to industrial and agricultural production, but the catch of freshwater fish has also dropped significantly. The production of many valuable fish species, such as Yangtze River shad and Heilongjiang salmon, has dropped sharply, and some have even become extinct. Fish deaths and human and animal poisoning incidents caused by national pollution have occurred frequently. The incidence of digestive system cancers such as liver cancer, stomach cancer, and esophageal cancer has increased year by year. my country's water pollution has reached a point where it must be controlled.

5. Noise pollution has a great impact on residents’ lives and health

According to statistics from 29 environmental protection departments, more than 30% of the letters and visits from the public reflect noise problems. The incidence of deafness, hypertension, heart disease, and neurasthenia among some factory workers is as high as 30% to 60%. According to statistics from the Department of Otolaryngology of Shanghai First Hospital, about one-third of ear disease patients are caused by noise. In some areas, noise has threatened the intellectual development of young people. Relevant departments predict that if no measures are taken, by the end of this century, 85% of urban residents in my country will not be able to work and live normally.

It's time to give points!!

How many kilograms of fish can be raised (produced) in an 8-mu freshwater pond?

The fish fry from the end of April can produce more than 2,000 kilograms in October. Generally, one mu of land can produce more than one ton of fish.