Answer the following questions briefly:
1. What are renewable sources of energy?
Renewable sources of energy are sources that can be .
They are in a short time.
Examples include and .
Examples include and .
2. What are non-renewable sources of energy?
Non-renewable sources of energy are sources that .
They are and may get over one day.
Examples include and .
They are and may get over one day.
Examples include and .