Is the firewood obtained by cutting of trees renewable or non renewable source of energy? Why?

Which are the renewable sources of energy ?

Which one of the following is a non-renewable source of energy ?

Give some examples for renewable sourcess of energy (AS_(1))

Why are we looking at alternative sources of energy ?

Explain sun as non-conventional source of energy.

Give scientific reasons for the following statements : Though hydropower is renewable source of energy, it creates certain problems.

The energy sources that can be regenerated are called renewable energy sources.

Define : Explain the terms : Non-conventional sources at energy