12th Zoology

Environmental impacts of Power Sources

Environmental impacts of Power Sources

1. Thermal Power

The air, water and soil pollution caused by these plants in terms of fly ash, CO2, SO2, NO2 and particulates etc. is becoming unacceptable in the environmentally conscious society

2. Hydro power

Hydro-electric power generation is associated with displacement and resettlement of human population from the site of hydel plant to other places. This leads to considerable human problems causing considerable delay in the implementation of the project and escalation of its cost. New dams built may affect the ecosystem of the locating sites.

3.Nuclear power

Radioactive pollutants released form nuclear power plants are chronically hazardous. The commissioning of boiling water power reactors (BWRS) have resulted in the critical accumulation of large number of long lived radionuclides in water. Environmentalists argue that thermal effluents from nuclear reactors have acutely affected the aquatic eco system. The dangerous radioactive waste cannot be buried in land without the risk of polluting soil and under ground water. Several well publicised accidents
(Ex. Chernobyl disaster at former U.S.S.R.) and radiation episodes have given a lot of fear in the mind of general public regarding the radiation hazards.

4. Solar energy

The use of solar energy, from the environmental viewpoint, is a
completely safe operation. However, the sites for larger installations of solar power plants should be selected without reducing the forest cover. Cadmium, used in fabricating thin film solar cells, is both poisonous and a possible carcinogen. Carbon dioxide produced while forming silicon from silica may increase the atmospheric temperature causing green house effect. Silicon dust is also an important occupational hazard.

5. Fossil fuels

The burning of coal, oil, wood, dung cakes and petroleum products
would cause environmental problems. (1)The increase in CO2 concentration is largely responsible for green house effect and global warming, while (2) disposal of fly ash requires large ash ponds and may pose a severe problem (3)The smoke produced by burning of wood, agricultural by-products or animal’s dung cake causes respiratory and digestive problems and may also
lead to eye and lung diseases. (4) Nitrous oxide, Sulphur di-oxide and CO2 can cause acid rain.

Related Topics in Zoology:

Bio Zoology All Important Topics

  1. Human population and explosion

  2. Population Explosion

  3. Growing Population and Environmental impacts

  4. Global warming – Green house effect

  5. Ozone layer depletion

  6. Prevention and Effect of Ozone depletions

  7. Waste management – Classification

  8. Management of hazardous wastes

  9. Management of non hazardous wastes

  10. Waste water treatment and management

  11. Biodiversity

  12. Conservation of Biodiversity

  13. Characteristics of a Bioreserve

  14. Energy crisis and its environmental impact

  15. Steps to be taken to resolve energy crisis

  16. Environmental impacts of Power Sources

  17. Poverty and environment

  18. Fresh water crisis and management

Unit 6. APPLIED BIOLOGY Topic List Zoology

  1. Livestock and Management

  2. Important cattle breeds and their characteristics

  3. Milch breeds (or) Dairy breeds

  4. Dual purpose breeds & Draught breeds

  5. Exotic breeds of cattle

  6. Common diseases and control in Cattle – Contagious diseases

  7. Non-contagious diseases – Cattle

  8. Techniques adopted in cattle breeding

  9. Poultry Breeds

  10. Farming methods

  11. Poultry byproducts

  12. Fish Pond

  13. Edible Fishes Of Tamilnadu

  14. Medical Lab Techniques – Stethoscope

  15. Sphygmomanometer

  16. Haemocytometer

  17. Urine Sugar analysis

  18. ECG Electrocardiogram

  19. Computed Tomography CT

  20. Endoscopy (Laproscopy) techniques , Artificial Pacemaker

  21. Autoanalyser

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