Why are we looking at alternate sources of energy?

What do you mean by non- conventional / alternative sources of energy ?

What is a good source of energy ?

Is bio - mass a renewable sources of energy?

What are the qualities of an ideal source of energy?

Is hydroelectric power a renewable source of energy?

State whether the following statements are true or false Exploiting any source of energy disturbs the environment in some way or the other.

Is geothermal energy a renewable source of energy?