What is geothermal energy? Write its disadvantages.
What is tidal energy? Why does tide occur in the sea or ocean.
Draw a diagram to show pumping of underground water using wind energy.
Write any two disadvantages of wind energy with reasons. or Give disadvantages of wind as source of energy.
Why is use of wood as fuel not advised although forest can be replenished. SEE 2074.
Why should the government of Nepal encourage to use the bio gas to its citizen.
Bio gas is considered as very useful for farmers why ?
Write any two disadvantages of biomass energy. or Name the disadvantages of using biomass.
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