SS2 Biology Lesson Note on Pollution

The website has the complete lesson note for all the subjects in secondary school but this piece showcases the SS2 Biology Lesson Note on Pollution. You can use the website search button to filter out the subject of interest to you.

CLICK HERE to download the complete Document: DOWNLOAD HERE

TOPIC: POLLUTION

CLASS: SS2                                                                                  

CONTENT:

1. Air Pollution
2. Noise pollution
3. Water pollution,

Pollution can be defined in the contamination of the environment due to main activities which releases. Harmful substances into our surrounding in quantities that is dangerous to man and his resources.

Types of pollution

Types of pollution include the following:

1. Air pollution,
2. Noise pollution
3. Water pollution,
4. Soil pollution,

Substances that pollute the environment are called pollutants thus: there are Air, water, soil and noise pollutants.

Czech Air Pollution

Factory smoke darkens the sky above Prague, Czech Republic. The Czech Republic faces a severe air pollution problem that is choking the nation’s land. Air pollution and subsequent acid rain has killed or damaged many of the country’s trees and badly degraded its soil.

SUB-TOPIC I. Air Pollution:

From man’s daily activities pollutants such as smoke, gasses and solids are disposes into the atmosphere. Air pollution can also be said to be presence of mixture of gases and solid patches in the air.

Nature of Air Pollution

Pollutants of the atmosphere (Air) include; gases, smoke, oxides of carbon, sulphur and nitrogen such as; carbon (iv) oxide, carbon (ii) oxide, sulphur (iv) oxide and oxides of nitrogen respectively as well as smoke, dust etc. Manufacturing industries, fumes from city Motor vehicles, power stations, combustion of fuels of automobiles and jet planes also release pollutants into the atmosphere. Herbicides, pesticides, aerosol, dust particles, pollen grains fluorides and smog are all pollutants of the atmosphere.

Sources of air pollutants

Fumes, dust, wastes from Construction sites, industries, mines, power station, farmlands, domestic fires, sprayed herbicides and pesticides are sources of air pollutants.

Industrial Smokestacks

Carbon dioxide, sulfur dioxide, and other types of contaminants pouring from industrial smokestacks contribute largely to the world’s atmospheric pollution. Carbon dioxide contributes significantly to global warming, while sulfur dioxide emissions are the principal cause of acid rain in the northeastern United States, southeastern Canada, and eastern Europe.

Effects of air pollution

Pollution of the atmosphere which is Air pollution affects man and his resources in various ways:

1. Smoke particles make streets and building dirty.
2. Smoke reduces visibility within the environment.
3. Smoke smog and dust can reduce intensity and quality of sunlight which in turn reduces photosynthesis and automatically crop yields.
4. Oxide of nitrogen in very high concentration can cause death of animals.
5. Nitrogen (iv) oxide cause irritation of the eyes in humans.
6. Carbon (ii) oxide can easily combine with haemoglobin that can reduce the oxygen carrying capacity of blood.
7. Sulphur (iv) oxide a pollutant resulting from the activities of petroleum refineries, poisons plant and lower their yield.
8. Sulphur (iv) oxide causes respiratory diseases as it damages respiratory organs.
9. It makes the soil highly acidic as it forms tetraoxosulphate (iv) acid in rain water and affects plant growth negatively.
10. Dust particles in the atmosphere reduces visibility and intensity of sunlight, dust in water spoils its quality for drinking.
11. Pollen grains present in dust trigger off bouts of lung disorders such as asthma.
12. Smog reduces visibility, hours of sunlight and could be dangerous for motorists.

Click on the Downloadable Button to get the FULL NOTE