What can be used as an alternative energy resource?

Question

What can be used as an alternative energy resource?

Answer 1

Now we often prefer the term renewable energy rather than alternative, because every fuel is an alternative to every other.

Renewable energy generally include sun, wind, water, geothermal, and things that grow on the ground or in the sea.

Some people include nuclear as an alternative energy but would not call it renewable. Others are looking for an alternative to nuclear.