Question

what is good source of energy?

Answer 1

the good source of energy is sunlight

Answer 2

A good source of energy fulfills the following criteria :
⏭It produces a lot of heat per unit mass.
⏭It does a huge amount of work per unit mass.
⏭It is easily accessible.
⏭It is easy to store and transport.
⏭It is economical.
⏭It produces less amount of smoke.