Q28 of 269 Page 149

What is the source of heat contained in geothermal energy?

Hot rocks present inside the earth are the source of heat contained in geothermal energy.


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27

Write any two advantages of using biogas.

 28

What is geothermal energy?

 28

Explain how, geothermal energy is used to generate electricity.

 28

State two advantages of geothermal energy.