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Anonymous users2024-02-05Environmental pollution and human health violations.
1. Teaching Objectives.
By introducing harmful pollution to humans, students can stay away from pollution and thus develop a healthy body.
To enable students to understand the harm caused by pollution to human beings, so that in their future work, they can start from themselves and from now on, and contribute to building our country into a country full of green waters and green mountains.
2. Teaching focus.
1) What is environmental pollution.
2) What are the environmental pollution and what are the causes of it.
3. Teaching content.
1) Definition of environmental pollution: refers to the phenomenon that the natural environment changes due to natural human factors and exceeds its self-purification ability, thereby destroying the ecological balance and affecting human health.
2) * Causes of environmental pollution: With the rapid increase of the world's population, the rapid development of industrialization, and the devastating development and utilization of natural resources by human beings, the problem of environmental pollution is becoming more and more serious, and it has begun to threaten the survival of human beings.
3) * Harm of air pollution to internal health: Air pollution is mainly caused by the pollution of the air by harmful gases such as dust and soot emitted from industrial production. At present, there are more than 100 pollutants in the air.
4) Direct harm to the human body: rhinitis, pharyngitis, tracheitis, tuberculosis and lung cancer of the respiratory tract; decreased function of the cardiovascular system; hepatomegaly, nephritis of internal organs; Dizziness, headaches, insomnia, neurasthenia of the nervous system. In addition, it has a negative impact on the endocrine system, skeletal system, and the development of adolescents and children.
5) Indirect harm to the human body: lead to the occurrence of rickets and eye diseases.
6) * Health hazards of water pollution: Water pollution mainly refers to the inflow and seepage of unpurified sewage, domestic sewage, garbage and various harmful substances discharged from factories into the water, causing rivers, rivers, lakes and seas to be polluted.
7) Direct harm to the human body: People directly drink contaminated water, which will lead to various gastrointestinal diseases, and seriously polluted water will directly lead to the occurrence of specific diseases, and even endanger life.
8) Indirect harm to the human body: Through the food chain, harmful water irrigates agricultural products, aquatic products in sewage, and animals that eat harmful substances are finally eaten by humans, which will endanger human health.
Health hazards of noise pollution: Noise pollution refers to the unconventional vibrations emitted by production, traffic and life.
1) Direct harm to the human body: cause irritability, headaches and hearing impairment. When the noise reaches 100 decibels, people are irritable and uncomfortable; ear pain when reaching 130 decibels; Eardrum rupture when reaching 160 decibels; Reaching 170 decibels results in death.
2) Indirect harm to the human body: living in an environment with noise of 70 to 90 decibels for a long time can cause nervous, cardiovascular, digestive system disorders, endocrine dysfunction, and lead to heart disease, cerebrovascular disease and psychological diseases.
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