Chapter 4 "Biological Science and Environmental Protection" ppt review courseware-People's Education Edition elective two courseware
November 15 19:00:44, 2024
Human Resources Edition Elective Part 2 Chapter 4 "Biological Science and Environmental Protection" ppt review courseware Sulfur dioxide is widely distributed in the atmosphere and is a considerable pollutant, so it is often used as the main indicator of air pollution. Sulfur dioxide rarely exists alone in the atmosphere. It often combines with flying dust and enters the human body. Most of it generates sulfurous acid and sulfuric acid with water in the upper respiratory tract, which has a strong stimulating effect on the mucosa. Long-term exposure can cause chronic conjunctivitis, rhinitis, pharyngitis, and bronchitis, and can cause bronchial asthma attacks.