Fill In the blanks:
__ sources of energy are more quickly used up than they are being replaced

Explanation

To solve the fill-in-the-blank question, we need to identify the type of energy sources that are consumed faster than they can be replenished.

### Step-by-step Solution:

1. **Understand the Question**: The question asks for a term that describes energy sources that are depleted more quickly than they can be replaced.

2. **Identify Types of Energy Sources**: There are two main categories of energy sources: renewable and non-renewable.
- **Renewable Energy Sources**: These are energy sources that can be replenished naturally over time, such as solar, wind, and hydro energy.
...