12th Zoology

Energy crisis and its environmental impact

Energy crisis and its environmental impact

Energy may be defined as any property, which can be produced from or converted into work. In today’s world for any development and for all industrial operations, energy is a prerequisite. Life is unthinkable without energy. Energy production and energy utilization are the indicators of a country’s progress. Heat, light, electricity are different forms of energy. While
energy drives the world, the energy generated and utilised affects environment on a phenomenal scale. More population, rapid industrialisation, increased energy generation, over production, uncontrolled consumption and damages to environment are all inter-linked issues. Major issues are slowly being converted into crisis threatening our survival. (Energy crisis and its environmental impact)

Background history of energy usage

Fire was probably the first human energy technology. Charcoal from fires has been found at sites occupied by our early ancestors. Wind and waterpower have been used early as long. Muscle power provided by domestic animals has been important for agriculture. The invention of the steam engine, together with diminishing supplies of wood in industrializing countries caused a switch to coal as our major energy source in the nineteenth century. Coal in turn, has been replaced by oil in this century due
to the ease of shipping, storing and burning liquid fuels. Recently electricity and gas (petrol) has changed the economic prosperity and lifestyle in many countries. (Energy crisis and its environmental impact)

Renewable and non-renewable energy sources

Energy sources that are being made available continuously are known as renewable energy sources. (Eg). geothermal energy, wind energy, tidal energy, solar energy, ocean currents, nuclear fusion, gobar gas, biomass and vegetable refuse etc.

Non-renewable sources of energy – those sources, which are being accumulated in nature from a very long time and cannot be replaced if they are exhausted. (Ex). Coal, ores, petroleum, timber, natural gas, electricity etc. Fossil fuels like petroleum, natural gas and coal are now providing about 95% of all commercial energy in the world. (Energy crisis and its environmental impact)

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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