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Compare and contrast bio-mass and hydro electricity as sources of energy.




Biomass hydro-electricity
Renewable source. Renewable source.
Clean source Clean source
Rate of availabilty is moderate This sources can be produced only at limited sites. 
Combustion of bio-mass is not eco-friendly. Production of the energy causes alot of environmental damage.
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Which of the following is not an example of a bio-mass energy source?

  • wood
  • gobar-gas
  • nuclear energy

  • coal


Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
  • geothermal energy
  • wind energy
  • nuclear energy
  • bio-mass.

What are the limitations of extracting energy from:
(a) the wind   
(b) waves
(c) tides?


Compare and contrast fossil fuels and the Sun as direct sources of energy.

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