HOW DOES AIR POLLUTION AFFECT TO PEOPLE AND ANIMALS?

Air pollution affect to people’s health, the growth of plants and animals and ozone layer.

1. Air pollution affect to people’s health:

-Some environmental poisons can cause acute illness and even death. Others may be harmful, but the disease may take years or even decades to appear.

-Air pollution mainly affects the respiratory system.Bronchitis, emphysema, asthma and lung cancer are some of the chronic diseases caused due to exposure to polluted air. It is feared that lung cancer is caused mainly due to polluted air because carcinogens are found in it. Its mortality rate is higher in urban areas.

-Pollutants including nitrogen dioxide and particulate matter from road traffic and sulphur dioxide, from the burning of fossil fuels, have been linked to suppressed lung growth in children, asthma, heart disease and the onset of type 2 diabetes. The exposure of pregnant women to air pollution has also been found to affect to foetal brain growth.

-According to a recent report by the Ministry of Natural Resources and Environment, the number of people suffering from respiratory diseases due to environmental pollution in Ho Chi Minh City has grown rapidly, currently accounting for about 4% of the total population.The rate of people with respiratory diseases in Ho Chi Minh City is 4–5 times higher than in other localities.

2. Air pollution affect to growth of animals and plants:

-Air pollution not only contributes to respiratory diseases in humans, it can also affect plants. The effects of air pollution on plants develop over time and can’t be undone. The impact of air pollution on animals is more or less similar to that on man. Chronic poisoning results from the ingestion of forage contaminated with atmospheric pollutants.

- Among the metallic contaminants, arsenic, lead and molybdenum are important. Fluoride is another pollutant, which causes fluorosis among animals.When acidic air pollutants combine with water droplets in clouds, the water becomes acidic and it was called “Acid Rain” . When those droplets fall to the ground, the acid rain can damage the environment. Damage due to acid rain kills trees and harms animals, fish, and other wildlife. Acid rain can destroy the leaves of plants and animals’ habitat.

When acid rain soaks into the ground, it can make the soil an unfit habitat for many living things. Acid rain also changes the chemistry of the water in lakes and streams, harming fish and other aquatic life. In Ho Chi Minh city, the occurrence of acid rain is about 39.8% and 41.2% per year.

3. Air pollution affect to ozone depletion:

-Chlorofluorocarbons or CFCs (also known as freon) are non-toxic, non-flammable and non-carcinogenic.Man-made CFCs are the main cause of stratospheric ozone depletion.

-CFCs have a lifetime of about 20 to 100 years, and consequently one free chlorine atom from a CFC molecule can do a lot of damage, destroying ozone molecules for a long time. Although emissions of CFCs around the developed world have largely ceased due to international control agreements, the damage to the stratospheric ozone layer will continue for a number of years to come.Ozone layer depletion increases the amount of UVB that reaches the Earth’s surface.

-Laboratory and epidemiological studies demonstrate that UVB causes non-melanoma skin cancer and plays a major role in malignant melanoma development. In addition, UVB has been linked to the development of cataracts, a clouding of the eye’s lens. Because all sunlight contains some UVB, even with stratospheric ozone levels, it is always important to protect your skin and eyes from the sun.

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